ENTER鍵可以讓光標移到下一個輸入框
![]()
程序代碼
<input οnkeydοwn="if(event.keyCode==13)event.keyCode=9" > <br>
只能是中文<input οnkeyup="value=value.replace(/[ -~]/g,'')" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能是英文和數字.屏蔽了輸入法<input style="ime-mode:disabled" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能輸入英文和數字<input οnkeyup="value=value.replace(/[/W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能是數字<input οnkeyup="value=value.replace(/[^/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))"><br>
只能顯示，不能修改的文本框<input readOnly value="只能顯示，不能修改">
只能是數字,判斷按鍵
![]()
程序代碼
獲取鍵盤的KeyCode
![]()
程序代碼
限制網頁用鍵盤
![]()
程序代碼
再加個找按鍵的值
![]()
程序代碼
只能是IP地址
![]()
程序代碼
註冊閱讀時間等待按鈕
![]()
程序代碼
用#default#savehistory防止後退清空text文本框：
![]()
程序代碼
TEXTAREA自適應文字行數的多少
![]()
程序代碼
上傳預覽圖片
![]()
程序代碼
去掉下拉選項的邊框
![]()
程序代碼
下拉列表打開窗口
![]()
程序代碼
TAB的顯示
![]()
程序代碼
文本框的上/下拉
![]()
程序代碼
一個複選框，點擊之後一組複選框全部都選上
![]()
程序代碼
程序代碼<input οnkeydοwn="if(event.keyCode==13)event.keyCode=9" > <br>
只能是中文<input οnkeyup="value=value.replace(/[ -~]/g,'')" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能是英文和數字.屏蔽了輸入法<input style="ime-mode:disabled" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能輸入英文和數字<input οnkeyup="value=value.replace(/[/W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> <br>
只能是數字<input οnkeyup="value=value.replace(/[^/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))"><br>
只能顯示，不能修改的文本框<input readOnly value="只能顯示，不能修改">
只能是數字,判斷按鍵
程序代碼<script language=javascript>
function onlyNum()
{
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)||(event.keyCode==8)))
event.returnValue=false;
}
</script>
<input οnkeydοwn="onlyNum();">
function onlyNum()
{
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)||(event.keyCode==8)))
event.returnValue=false;
}
</script>
<input οnkeydοwn="onlyNum();">
獲取鍵盤的KeyCode
程序代碼<html>
<head>
<script language="javascript">
ns4 = (document.layers) ? true : false;
ie4 = (document.all) ? true : false;
function keyDown(e){
if(ns4){
var nkey=e.which;
var iekey='現在是ns瀏覽器';
var realkey=String.fromCharCode(e.which);
}
if(ie4){
var iekey=event.keyCode;
var nkey='現在是ie瀏覽器';
var realkey=String.fromCharCode(event.keyCode);
if(event.keyCode==32){realkey='/' 空格/''}
if(event.keyCode==13){realkey='/' 回車/''}
if(event.keyCode==27){realkey='/' Esc/''}
if(event.keyCode==16){realkey='/' Shift/''}
if(event.keyCode==17){realkey='/' Ctrl/''}
if(event.keyCode==18){realkey='/' Alt/''}
}
alert('ns瀏覽器中鍵值:'+nkey+'/n'+'ie瀏覽器中鍵值:'+iekey+'/n'+'實際鍵爲'+realkey);
}
document.onkeydown = keyDown;
if(ns4){
document.captureEvents(Event.KEYDOWN);}
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>請按任意一個鍵。。。。</h3>
</center>
</body>
</html>
<head>
<script language="javascript">
ns4 = (document.layers) ? true : false;
ie4 = (document.all) ? true : false;
function keyDown(e){
if(ns4){
var nkey=e.which;
var iekey='現在是ns瀏覽器';
var realkey=String.fromCharCode(e.which);
}
if(ie4){
var iekey=event.keyCode;
var nkey='現在是ie瀏覽器';
var realkey=String.fromCharCode(event.keyCode);
if(event.keyCode==32){realkey='/' 空格/''}
if(event.keyCode==13){realkey='/' 回車/''}
if(event.keyCode==27){realkey='/' Esc/''}
if(event.keyCode==16){realkey='/' Shift/''}
if(event.keyCode==17){realkey='/' Ctrl/''}
if(event.keyCode==18){realkey='/' Alt/''}
}
alert('ns瀏覽器中鍵值:'+nkey+'/n'+'ie瀏覽器中鍵值:'+iekey+'/n'+'實際鍵爲'+realkey);
}
document.onkeydown = keyDown;
if(ns4){
document.captureEvents(Event.KEYDOWN);}
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>請按任意一個鍵。。。。</h3>
</center>
</body>
</html>
限制網頁用鍵盤
程序代碼<body οnkeydοwn="alert('禁用');return false;">
限制鍵盤的某個鍵：body οnkeydοwn="if(event.keyCode==num){alert('禁用');return false;}
限制鍵盤的某個鍵：body οnkeydοwn="if(event.keyCode==num){alert('禁用');return false;}
再加個找按鍵的值
程序代碼<script>
function show(){
alert("ASCII代碼是："+event.keyCode);
}
</script>
<body οnkeydοwn="show()">
function show(){
alert("ASCII代碼是："+event.keyCode);
}
</script>
<body οnkeydοwn="show()">
只能是IP地址
程序代碼<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<style>
.a3{width:30;border:0;text-align:center}
</style>
<script>
function mask(obj){
obj.value=obj.value.replace(/[^/d]/g,'')
key1=event.keyCode
if (key1==37 || key1==39)
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))
nextip=key1==37?nextip-1:nextip+1;
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
if(obj.value.length>=3)
if(parseInt(obj.value)>=256 || parseInt(obj.value)<=0)
{
alert(parseInt(obj.value)+"IP地址錯誤！")
obj.value=""
obj.focus()
return false;
}
else
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))+1
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
}
function mask_c(obj)
{
clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))
}
</script>
<title>IP地址輸入</title>
</head>
<body>IP地址輸入
<div style="border-width:1;border-color:balck;border-style:solid;width:165;font-size:9pt">
<input type=text name=ip1 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip2 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip3 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip4 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>
</div>
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<style>
.a3{width:30;border:0;text-align:center}
</style>
<script>
function mask(obj){
obj.value=obj.value.replace(/[^/d]/g,'')
key1=event.keyCode
if (key1==37 || key1==39)
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))
nextip=key1==37?nextip-1:nextip+1;
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
if(obj.value.length>=3)
if(parseInt(obj.value)>=256 || parseInt(obj.value)<=0)
{
alert(parseInt(obj.value)+"IP地址錯誤！")
obj.value=""
obj.focus()
return false;
}
else
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))+1
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
}
function mask_c(obj)
{
clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))
}
</script>
<title>IP地址輸入</title>
</head>
<body>IP地址輸入
<div style="border-width:1;border-color:balck;border-style:solid;width:165;font-size:9pt">
<input type=text name=ip1 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip2 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip3 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip4 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask_c()>
</div>
</body>
</html>
註冊閱讀時間等待按鈕
程序代碼<form action="http://www.5dm.cn/bbs/" method="post" name="agree">
歡迎註冊織夢論壇：
條款若干........
<input type="submit" value="請認真查看<服務條款和聲明> (15)" name="agreeb">
</form>
<SCRIPT language=javascript>
<!--
var secs = 15;
document.agree.agreeb.disabled=true;
for(i=1;i<=secs;i++) {
window.setTimeout("update(" + i + ")", i * 1000);
}
function update(num) {
if(num == secs) {
document.agree.agreeb.value =" 我 同 意 ";
document.agree.agreeb.disabled=false;
}
else {
printnr = secs-num;
document.agree.agreeb.value = "請認真查看<服務條款和聲明> (" + printnr +")";
}
}
//-->
</SCRIPT>
歡迎註冊織夢論壇：
條款若干........
<input type="submit" value="請認真查看<服務條款和聲明> (15)" name="agreeb">
</form>
<SCRIPT language=javascript>
<!--
var secs = 15;
document.agree.agreeb.disabled=true;
for(i=1;i<=secs;i++) {
window.setTimeout("update(" + i + ")", i * 1000);
}
function update(num) {
if(num == secs) {
document.agree.agreeb.value =" 我 同 意 ";
document.agree.agreeb.disabled=false;
}
else {
printnr = secs-num;
document.agree.agreeb.value = "請認真查看<服務條款和聲明> (" + printnr +")";
}
}
//-->
</SCRIPT>
用#default#savehistory防止後退清空text文本框：
程序代碼<HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.saveHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=saveHistory type=text id=oPersistInput>
<input type=button οnclick='javascript:location.href="http://www.cnbruce.com/red/"' value='點擊進入,再按後退鍵試試？'>
</BODY>
</HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.saveHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=saveHistory type=text id=oPersistInput>
<input type=button οnclick='javascript:location.href="http://www.cnbruce.com/red/"' value='點擊進入,再按後退鍵試試？'>
</BODY>
</HTML>
TEXTAREA自適應文字行數的多少
程序代碼<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight">
上傳預覽圖片
程序代碼<img id=pic src=http://www.cnbruce.com/images/logo.gif>
<input type=file name=file><input type=button οnclick=pic.src=file.value value=預覽圖片>
<input type=button οnclick=alert(file.value) value=圖片地址>
<input type=button οnclick="file.outerHTML=file.outerHTML.replace(/value=/w/g,'')" value="清除file裏字">
<input type=file name=file><input type=button οnclick=pic.src=file.value value=預覽圖片>
<input type=button οnclick=alert(file.value) value=圖片地址>
<input type=button οnclick="file.outerHTML=file.outerHTML.replace(/value=/w/g,'')" value="清除file裏字">
去掉下拉選項的邊框
程序代碼<div style="position: absolute; left: 10px; top: 10px; width: 115px; height: 20px; clip:rect(2 114 20 2);">
<select>
<option >cnpeople</option>
<option >cnrose</option>
<option >cnbruce</option>
</select>
</font>
</div>
<select>
<option >cnpeople</option>
<option >cnrose</option>
<option >cnbruce</option>
</select>
</font>
</div>
下拉列表打開窗口
程序代碼<select onChange="if(this.selectedIndex && this.selectedIndex!=0){window.open(this.value);}this.selectedIndex=0;">
<option selected>更多鏈接……</option>
<option value="http://www.cnbruce.com">cnbruce</option>
<option value="http://daonet.myrice.com/old/">daonet</option>
<option value="http://www.blueidea.com">blue!dea
</select>
<option selected>更多鏈接……</option>
<option value="http://www.cnbruce.com">cnbruce</option>
<option value="http://daonet.myrice.com/old/">daonet</option>
<option value="http://www.blueidea.com">blue!dea
</select>
TAB的顯示
程序代碼<script>
function editTab()
{
var code, sel, tmp, r
var tabs=""
event.returnValue = false
sel =event.srcElement.document.selection.createRange()
r = event.srcElement.createTextRange()
switch (event.keyCode)
{
case (8) :
if (!(sel.getClientRects().length > 1))
{
event.returnValue = true
return
}
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
sel.setEndPoint("startToStart", tmp)
sel.text = sel.text.replace(/^/t/gm, "")
code = code.replace(/^/t/gm, "").replace(//r/n/g, "/r")
r.findText(code)
r.select()
break
case (9) :
if (sel.getClientRects().length > 1)
{
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
sel.setEndPoint("startToStart", tmp)
sel.text = "/t"+sel.text.replace(//r/n/g, "/r/t")
code = code.replace(//r/n/g, "/r/t")
r.findText(code)
r.select()
}
else
{
sel.text = "/t"
sel.select()
}
break
case (13) :
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
tmp.setEndPoint("endToEnd", sel)
for (var i=0; tmp.text.match(/^[/t]+/g) && i<tmp.text.match(/^[/t]+/g)[0].length; i++) tabs += "/t"
sel.text = "/r/n"+tabs
sel.select()
break
default :
event.returnValue = true
break
}
}
</script>
<textarea cols=75 rows=20 οnkeydοwn="editTab()">
<script>
alert("ok")
</script>
</textarea>
function editTab()
{
var code, sel, tmp, r
var tabs=""
event.returnValue = false
sel =event.srcElement.document.selection.createRange()
r = event.srcElement.createTextRange()
switch (event.keyCode)
{
case (8) :
if (!(sel.getClientRects().length > 1))
{
event.returnValue = true
return
}
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
sel.setEndPoint("startToStart", tmp)
sel.text = sel.text.replace(/^/t/gm, "")
code = code.replace(/^/t/gm, "").replace(//r/n/g, "/r")
r.findText(code)
r.select()
break
case (9) :
if (sel.getClientRects().length > 1)
{
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
sel.setEndPoint("startToStart", tmp)
sel.text = "/t"+sel.text.replace(//r/n/g, "/r/t")
code = code.replace(//r/n/g, "/r/t")
r.findText(code)
r.select()
}
else
{
sel.text = "/t"
sel.select()
}
break
case (13) :
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
tmp.setEndPoint("endToEnd", sel)
for (var i=0; tmp.text.match(/^[/t]+/g) && i<tmp.text.match(/^[/t]+/g)[0].length; i++) tabs += "/t"
sel.text = "/r/n"+tabs
sel.select()
break
default :
event.returnValue = true
break
}
}
</script>
<textarea cols=75 rows=20 οnkeydοwn="editTab()">
<script>
alert("ok")
</script>
</textarea>
文本框的上/下拉
程序代碼<form name="cnbruce">
<textarea name="com">
</textarea>
</form>
<SPAN title='放大輸入框' style='FONT-SIZE: 12px; CURSOR: hand' οnclick=document.cnbruce.com.rows+=4>向下</SPAN>
<SPAN title='縮小輸入框' style='FONT-SIZE: 12px; CURSOR: hand' class='arrow' οnclick='if(document.cnbruce.com.rows>=4)document.cnbruce.com.rows-=4;else return false'>向上</SPAN>
<textarea name="com">
</textarea>
</form>
<SPAN title='放大輸入框' style='FONT-SIZE: 12px; CURSOR: hand' οnclick=document.cnbruce.com.rows+=4>向下</SPAN>
<SPAN title='縮小輸入框' style='FONT-SIZE: 12px; CURSOR: hand' class='arrow' οnclick='if(document.cnbruce.com.rows>=4)document.cnbruce.com.rows-=4;else return false'>向上</SPAN>
一個複選框，點擊之後一組複選框全部都選上
程序代碼<input type="checkbox" name="checkA" onpropertychange="for(i=0;i<A.children.length;i++){A.children[i].checked=this.checked}">a
<br>
<span id="A">
<input type="checkbox" name="A1">
<input type="checkbox" name="A2">
<input type="checkbox" name="A3">
</span>
select裏的option進行分類列表
![]()
程序代碼
動態添加
![]()
程序代碼
提示限制輸入的字符數
![]()
程序代碼
判斷填寫字數的限制
<script language=javascript>
function gbcount(message,total,used,remain)
{
var max;
max = total.value;
if(message.value.length > max){
message.value = message.value.substring(0,max);
used.value = max;
remain.value = 0;
alert('留言不能超過規定的字數!');
}
else{
used.value = message.value.length;
remain.value = max - used.value;
}
}
</script>
<form name='myform' >
<textarea name='GuestContent' cols='59' rows='6' οnkeydοwn=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain); οnkeyup=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain);></textarea>
最多字數：<INPUT disabled maxLength=4 name=total size=3 value=20>
已用字數：<INPUT disabled maxLength=4 name=used size=3 value=0>
剩餘字數：<INPUT disabled maxLength=4 name=remain size=3>
</form>
<br>
<span id="A">
<input type="checkbox" name="A1">
<input type="checkbox" name="A2">
<input type="checkbox" name="A3">
</span>
select裏的option進行分類列表
程序代碼<span style="position:absolute;border:1px inset #d3d6d9"><select style="margin:-2px; width:200px">
<option selected>------------請選擇------------</option>
<optgroup label="JavaScript&VBScript區">
<option>原 創
<option>經 典
<optgroup label="後臺區">
<option>asp&sql
<option>php&mysql
</select></span>
<option selected>------------請選擇------------</option>
<optgroup label="JavaScript&VBScript區">
<option>原 創
<option>經 典
<optgroup label="後臺區">
<option>asp&sql
<option>php&mysql
</select></span>
動態添加
程序代碼<form name="myForm" method="post">
<select name="dept_company" size="10" multiple id="dept_company" class="mySelect">
<option value="">Please Select...</option>
<option value="a">AA</option>
<option value="b">BB</option>
<option value="c">CC</option>
</select><input name="dept_company_list" type="hidden">
<input name="button" type="button" class="myButton" onClick="addItem('dept_company','dept_company2')" value="添加-->>">
<input name="button" type="button" class="myButton" onClick="deleteItem('dept_company2','dept_company')" value="<<--刪除">
<select name="dept_company2" size="10" multiple id="dept_company2" class="mySelect">
</select>
</form>
<script>
function addItem(fromName,toName){
eval("var obj1=myForm."+fromName);
eval("var obj2=myForm."+toName);
obj1.options[0].selected=false;
if(obj1.selectedIndex == -1)
return false;
var tempValue;
var tempText;
for(var i=1;i<obj1.length;i++){ //begin from 1
if(obj1.selectedIndex == -1)break;
tempValue=obj1.options[obj1.selectedIndex].value;
tempText=obj1.options[obj1.selectedIndex].text;
obj1.options[obj1.selectedIndex]=null;
obj2.add(new Option(tempText,tempValue),0);
}
}
function deleteItem(fromName,toName){
eval("var obj1=myForm."+fromName);
eval("var obj2=myForm."+toName);
if(obj1.selectedIndex == -1)
return false;
var tempValue;
var tempText;
for(var i=0;i<obj1.length;i++){ //begin from 0
if(obj1.selectedIndex == -1)break;
tempValue=obj1.options[obj1.selectedIndex].value;
tempText=obj1.options[obj1.selectedIndex].text;
obj1.options[obj1.selectedIndex]=null;
obj2.add(new Option(tempText,tempValue),1); //addItem index is 1
}
}
</script>
<select name="dept_company" size="10" multiple id="dept_company" class="mySelect">
<option value="">Please Select...</option>
<option value="a">AA</option>
<option value="b">BB</option>
<option value="c">CC</option>
</select><input name="dept_company_list" type="hidden">
<input name="button" type="button" class="myButton" onClick="addItem('dept_company','dept_company2')" value="添加-->>">
<input name="button" type="button" class="myButton" onClick="deleteItem('dept_company2','dept_company')" value="<<--刪除">
<select name="dept_company2" size="10" multiple id="dept_company2" class="mySelect">
</select>
</form>
<script>
function addItem(fromName,toName){
eval("var obj1=myForm."+fromName);
eval("var obj2=myForm."+toName);
obj1.options[0].selected=false;
if(obj1.selectedIndex == -1)
return false;
var tempValue;
var tempText;
for(var i=1;i<obj1.length;i++){ //begin from 1
if(obj1.selectedIndex == -1)break;
tempValue=obj1.options[obj1.selectedIndex].value;
tempText=obj1.options[obj1.selectedIndex].text;
obj1.options[obj1.selectedIndex]=null;
obj2.add(new Option(tempText,tempValue),0);
}
}
function deleteItem(fromName,toName){
eval("var obj1=myForm."+fromName);
eval("var obj2=myForm."+toName);
if(obj1.selectedIndex == -1)
return false;
var tempValue;
var tempText;
for(var i=0;i<obj1.length;i++){ //begin from 0
if(obj1.selectedIndex == -1)break;
tempValue=obj1.options[obj1.selectedIndex].value;
tempText=obj1.options[obj1.selectedIndex].text;
obj1.options[obj1.selectedIndex]=null;
obj2.add(new Option(tempText,tempValue),1); //addItem index is 1
}
}
</script>
提示限制輸入的字符數
程序代碼<script language="JavaScript">
<!--
function SymError()
{
return true;
}
window.onerror = SymError;
function strlength(str){
var l=str.length;
var n=l
for (var i=0;i<l;i++)
{
if (str.charCodeAt(i)<0||str.charCodeAt(i)>255) n++
}
return n
}
function changebyte(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte").innerText="輸入字節數超出範圍"
}
return true
}
function changebyte1(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte1").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte1").innerText="輸入字節數超出範圍"
}
return true
}
function changebyte2(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte2").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte2").innerText="輸入字節數超出範圍"
}
return true
}
</script>
<form method="post" name=test onSubmit="return checkdata()" action="">
<TEXTAREA οnkeydοwn="return changebyte1(document.test.icqcontent.value,198)" οnkeyup="return changebyte1(document.test.icqcontent.value,198)" name=icqcontent cols=40 rows="3"></TEXTAREA>
<SPAN id=byte1><SCRIPT language=JavaScript>changebyte1(document.test.icqcontent.value,198);</SCRIPT></SPAN>
</form>
<!--
function SymError()
{
return true;
}
window.onerror = SymError;
function strlength(str){
var l=str.length;
var n=l
for (var i=0;i<l;i++)
{
if (str.charCodeAt(i)<0||str.charCodeAt(i)>255) n++
}
return n
}
function changebyte(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte").innerText="輸入字節數超出範圍"
}
return true
}
function changebyte1(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte1").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte1").innerText="輸入字節數超出範圍"
}
return true
}
function changebyte2(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all("byte2").innerText="還可以輸入"+(length-l)+"字節"
}
else
{
document.all("byte2").innerText="輸入字節數超出範圍"
}
return true
}
</script>
<form method="post" name=test onSubmit="return checkdata()" action="">
<TEXTAREA οnkeydοwn="return changebyte1(document.test.icqcontent.value,198)" οnkeyup="return changebyte1(document.test.icqcontent.value,198)" name=icqcontent cols=40 rows="3"></TEXTAREA>
<SPAN id=byte1><SCRIPT language=JavaScript>changebyte1(document.test.icqcontent.value,198);</SCRIPT></SPAN>
</form>
判斷填寫字數的限制
<script language=javascript>
function gbcount(message,total,used,remain)
{
var max;
max = total.value;
if(message.value.length > max){
message.value = message.value.substring(0,max);
used.value = max;
remain.value = 0;
alert('留言不能超過規定的字數!');
}
else{
used.value = message.value.length;
remain.value = max - used.value;
}
}
</script>
<form name='myform' >
<textarea name='GuestContent' cols='59' rows='6' οnkeydοwn=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain); οnkeyup=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain);></textarea>
最多字數：<INPUT disabled maxLength=4 name=total size=3 value=20>
已用字數：<INPUT disabled maxLength=4 name=used size=3 value=0>
剩餘字數：<INPUT disabled maxLength=4 name=remain size=3>
</form>
