<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>自動提示的文本框</title>
<style>
<!--
body {
font-family:Arial, Helvetica, sans-serif;
font-size:12px;
padding:0px;
margin:5px;
}
form {
padding:0px;
margin:0px;
}
input {
/* 用戶輸入框的樣式 */
font-family:Arial, Helvetica, sans-serif;
font-size:12px;
border:1px solid #000000;
width:200px;
padding:1px;
margin:0px;
}
#popup {
/* 提示框div塊的樣式 */
position:absolute;
width:202px;
color:#004a7e;
font-size:12px;
font-family:Arial, Helvetica, sans-serif;
left:41px;
top:25px;
}
#popup.show {
/* 顯示提示框的邊框 */
border:1px solid #004a7e;
}
#popup.hide {
/* 隱藏提示框的邊框 */
border:none;
}
/* 提示框的樣式風格 */
ul {
list-style:none;
margin:0px;
padding:0px;
}
li.mouseOver {
background-color:#004a7e;
color:#FFFFFF;
}
li.mouseOut {
background-color:#FFFFFF;
color:#004a7e;
}
-->
</style>
<script language="javascript">
var oInputField; //考慮到很多函數中都要使用
var oPopDiv; //因此採用全局變量的形式
var oColorsUl;
var aColors = ["red","green","blue","magenta","yellow","chocolate","black","aquamarine","lime","fuchsia","brass","azure","brown","bronze","deeppink","aliceblue","gray","copper","coral","feldspar","orange","orchid","pink","plum","quartz","purple","antiquewith","blanchedalmond","blueviolet","beige","burlywood","bisque","cadetblue","saddlebrown","royalblue","rosybrown","orengered","olivedrab","powderblue","peachpuff","papayawhip","paleturquoise","palevioletred","palegreen","navyblue","navajowhite","palegodenrod","violetred","yellowgreen","tomato","turquoise","thistle","springgreen","steelblue","salmon","scarlet","silver","violet","snow","tan","chartreuse","khaki","mediumslateblue","mediumvioletred","oldlace","maroom","goldenrod","wheat","whitesmoke","moccasin","mistyrose","mintcream","midnightblue","dimgray","darksalmon","slategray","skyblue","sienna","seashell","seagreen","sandybrown","gold","mediumturquoise","navy","mediumspringgreen","mediumseagreen","mediumpurpul","peru","mediumorchid","mediumblue","mediumaquamarine","maroon","limegreen","lightyellow","lightsteelblue","magenta","lightslateblue","lightslategray","lightskyblue","inen","lightseagreen","lightsalmon","lightpink","lightgray","lightgreen","lightgodenrodyellow","indianred","lavender","lightblue","lavenderblush","lightcoral","lightcyan","lightgodenrod","hotpink","greenyellow","lemonchiffon","lawngreen","deepskyblue","honeydew","golenrod","forestgreen","gostwhite","gainsboro","firebrick","dodgerblue","darkturquoise","darkslateblue","darkslategray","darkseagreen","darkred","darkorchid","darkorenge","darkviolet","floralwhite","cyan","darkgray","cornsilk","darkolivegreen","darkgoldenrod","darkblue","darkcyan","darkgreen","darkhaki","ivory","darkmagenta","cornfloewrblue"];
aColors.sort(); //按字母排序，使顯示結果更友好
function initVars(){
//初始化變量
oInputField = document.forms["myForm1"].colors;
//得到div標記的引用
oPopDiv = document.getElementById("popup");
//得到選擇ul標記的引用
oColorsUl = document.getElementById("colors_ul");
}
function clearColors(){
//清除提示內容 每次輸入新的字符時要重新開始計數
for(var i=oColorsUl.childNodes.length-1;i>=0;i--)
oColorsUl.removeChild(oColorsUl.childNodes[i]);
//利用CSS標記來顯示隱藏段區域
oPopDiv.className = "hide";
}
function setColors(the_colors){
//顯示提示框，傳入的參數即爲匹配出來的結果組成的數組
clearColors(); //每輸入一個字母就先清除原先的提示，再繼續
oPopDiv.className = "show";
var oLi;
for(var i=0;i<the_colors.length;i++){
//將匹配的提示結果逐一顯示給用戶
//創建一個選擇框
oLi = document.createElement("li");
//加到ul標記上
oColorsUl.appendChild(oLi);
//創建文本區域
oLi.appendChild(document.createTextNode(the_colors[i]));
oLi.onmouseover = function(){
this.className = "mouseOver"; //鼠標經過時高亮
}
oLi.onmouseout = function(){
this.className = "mouseOut"; //離開時恢復原樣
}
oLi.onclick = function(){
//用戶點擊某個匹配項時，設置輸入框爲該項的值
oInputField.value = this.firstChild.nodeValue;
clearColors(); //同時清除提示框
}
}
}
function findColors(){
initVars(); //初始化變量
if(oInputField.value.length > 0){
var aResult = new Array(); //用於存放匹配結果
for(var i=0;i<aColors.length;i++) //從顏色表中找匹配的顏色
//必須是從單詞的開始處匹配
if(aColors[i].indexOf(oInputField.value) == 0)
aResult.push(aColors[i]); //壓入結果
if(aResult.length>0) //如果有匹配的顏色則顯示出來
setColors(aResult);
else //否則清除，用戶多輸入一個字母
clearColors(); //就有可能從有匹配到無，到無的時候需要清除
}
else
clearColors(); //無輸入時清除提示框（例如用戶按del鍵）
}
</script>
</head>
<body>
<form method="post" name="myForm1">
Color:
<input type="text" name="colors" id="colors" οnkeyup="findColors();" />
</form>
<div id="popup">
<ul id="colors_ul">
</ul>
</div>
</body>
</html>中間遇到過一個小問題 就是要求js與html的編碼一致 不然會出現亂碼