模拟一下:
<%
dim bbb
bbb=10
response.write "<input type='hidden' name='bbb' id='b' value='"&bbb&"'>"
%>
<script language="javascript">
function check()
{
var num=document.getElementById("a").value
if(isNaN(num)==true || num.indexOf(".")!=-1)
{
alert("请输入数字!")
num = num.substr(0,(num.length-1))
document.getElementById("a").value=num
}
}
function ccc()
{
var a=eval(document.getElementById("a").value)
var b=eval(document.getElementById("b").value)
if(a>b)
{
alert("aaa大于bbb!")
return false
}
}
</script>
<form name="form" method="post" action="1.asp" onSubmit="javascript:return ccc()">
<input name="aaa" id="a" onkeyup="check()">
<input type="Submit" name="Submit" value="提交">
</form>
function go(){var a = "3111"
var b = "2222"
var c = a.substring(0,1)
var d = b.substring(0,1)
alert(c+" "+d)
if(c>d){
alert("c大")
}else if(c==d){
alert("一样大")
}else{
alert("d大")
}
}