限制为整数
<html>
<head>
[removed]
var G=document.getElementById;
function checkNumber(){
var reg = /^(?:0|[1-9][0-9]?|100)$/;
var strNumber = G(txtNumber).value;
alert(reg.test(strNumber))
}
[removed]
</head>
<body >
<input type=text value= id=