<script language="javascript">
function check()
{
var str=document.getElementById("input1").value
obj=str.match(/^[鲁][A-Z]{1}[A-Z0-9]{5}$/)
if(obj==null)
{
alert("请输入正确的号码")
return false;
}
}
</script>
<form method="post" action="1.asp" onsubmit="javascript:return check()">
<input id="input1" maxLength="7">
<input type="submit" value="提交">
</form>
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