我要评论限制为整数
<html>
<head>
<script language="javascript" type="text/javascript">
var g=document.getelementbyid;
function checknumber(){
var reg = /^(?:0|[1-9][0-9]?|100)$/;
var strnumber = g("txtnumber").value;
alert(reg.test(strnumber))
}
</script>
</head>
<body >
<input type="text" value="" id="txtnumber" title="please enter a number witch between 0 and 100 ..">
<button onclick="checknumber();">checknumber</button>
</body>
</html>
限制为货币
<script language="javascript" type="text/javascript">
<!--
function checkmoney(obj){
var tempvalue=obj.value.replace(/(^\s+)|(\s+$)/g,'');
if(!tempvalue){return;}
if(/^-?\d+(\.\d+)?$/.test(tempvalue)){
obj.value=parsefloat(tempvalue).tofixed(2);
}else{
alert('请输入合法的货币值！');
obj.select();
return;
}
}
//-->
</script>
onblur="checkmoney(this)"
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