<script language="JavaScript">
<!--
function isID(id)
{
var str = id;
var areg = /^[a-zA-Z—_]+([a-zA-Z—_]|\d)*$/;
if (areg.test(str))
{
return true;
}
else
{
return false;
}}alert(isID("35_sdf"));
alert(isID("_sdDF3456f"));
//-->
</script>
<!--
function isID(id)
{
var str = id;
var areg = /^[a-zA-Z—_]+([a-zA-Z—_]|\d)*$/;
if (areg.test(str))
{
return true;
}
else
{
return false;
}}alert(isID("35_sdf"));
alert(isID("_sdDF3456f"));
//-->
</script>
\w 等价 [A-Za-z0-9_]
<!--
function isID(id)
{
var str = id;
var areg = /^[a-zA-Z_\u4e00-\u9fa5]+[a-zA-Z0-9_\u4e00-\u9fa5]*$/;
if (areg.test(str))
{
return true;
}
else
{
return false;
}}alert(isID("35_sdf"));
alert(isID("~!@#$%^&*|?"));
//-->
</script>//没通过啊