限制文本框只能輸數字(最多兩位小數)

function isTriDecimal(value){
                if(value!=null&&value!=''){
                    var decimalIndex=value.indexOf('.');
                    if(decimalIndex=='-1'){
                        return false;
                    }else{
                        var decimalPart=value.substring(decimalIndex+1,value.length);
                        if(decimalPart.length>2){
                            return true;
                        }else{
                            return false;
                        }
                    }
                }
                return false;
            }    <<SPAN class=hilite1>input</SPAN> name="sumAdjust" type="text" id="sumAdjust" size="20" value='<c:out value="${form1.sumAdjust}" />'        οnkeyup="if(isNaN(value)||isTriDecimal(value))execCommand('undo')"       onafterpaste="if(isNaN(value)||isTriDecimal(value))execCommand('undo')"   />   function isTriDecimal(value){
                if(value!=null&&value!=''){
                    var decimalIndex=value.indexOf('.');
                    if(decimalIndex=='-1'){
                        return false;
                    }else{
                        var decimalPart=value.substring(decimalIndex+1,value.length);
                        if(decimalPart.length>2){
                            return true;
                        }else{
                            return false;
                        }
                    }
                }
                return false;
            }

<<SPAN class=hilite1>input</SPAN> name="sumAdjust" type="text" id="sumAdjust" size="20" value='<c:out value="${form1.sumAdjust}" />'
    οnkeyup="if(isNaN(value)||isTriDecimal(value))execCommand('undo')"
    onafterpaste="if(isNaN(value)||isTriDecimal(value))execCommand('undo')"
/>
function isTriDecimal(value){
				if(value!=null&&value!=''){
					var decimalIndex=value.indexOf('.');
					if(decimalIndex=='-1'){
						return false;
					}else{
						var decimalPart=value.substring(decimalIndex+1,value.length);
						if(decimalPart.length>2){
							return true;
						}else{
							return false;
						}
					}
				}
				return false;
			}

<input name="sumAdjust" type="text" id="sumAdjust" size="20" value='<c:out value="${form1.sumAdjust}" />' 
	οnkeyup="if(isNaN(value)||isTriDecimal(value))execCommand('undo')" 
	onafterpaste="if(isNaN(value)||isTriDecimal(value))execCommand('undo')"
/>
 1.文本框只能輸入數字代碼(小數點也不能輸入)<input οnkeyup="this.value=this.value.replace(//D/g,'')" onafterpaste="this.value=this.value.replace(//D/g,'')">
2.只能輸入數字,能輸小數點.<input οnkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')"><input name=txt1 οnchange="if(//D/.test(this.value)){alert('只能輸入數字');this.value='';}">
3.數字和小數點方法二<input type=text tvalue="" ovalue="" οnkeypress="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.tvalue=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.ovalue=this.value" οnkeyup="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.tvalue=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.ovalue=this.value" οnblur="if(!this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?|/./d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^/./d+$/))this.value=0+this.value;if(this.value.match(/^/.$/))this.value=0;this.ovalue=this.value}">
4.只能輸入字母和漢字<input οnkeyup="value=value.replace(/[/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[/d]/g,''))" maxlength=10 name="Numbers">
5.只能輸入英文字母和數字,不能輸入中文<input οnkeyup="value=value.replace(/[^/w/.//]/ig,'')">
6.只能輸入數字和英文<font color="Red">chun</font><input onKeyUp="value=value.replace(/[^/d|chun]/g,'')">
7.小數點後只能有最多兩位(數字,中文都可輸入),不能輸入字母和運算符號:<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">
8.小數點後只能有最多兩位(數字,字母,中文都可輸入),可以輸入運算符號:<input οnkeyup="this.value=this.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,'$1$2.$3')">
9.只能輸入中文：
<input name="realname" type="text"  maxlength="20" class="input_style" value="<%=realname%>" οnkeyup="value=value.replace(/[^/u4E00-/u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/u4E00-/u9FA5]/g,''))" />