lunzi

<script language="javascript" >
  function sub_mit(frm){
	if(frm.username.value==""){
		alert("请输入姓名！");
		frm.username.focus();
		return (false);
	}
	if(!isDigit(frm.tel.value)){
		alert("联系电话必须为数字");
		frm.tel.focus();
		return (false);
	}
	 if(!isTel(frm.tel.value)){
		alert("手机号码位数不得少于7位!");
		frm.tel.focus();
		return (false);
	 }
	if(frm.address.value==""){
		alert("请输入通信地址！");
		frm.address.focus();
		return (false);
	}
	if(frm.passWord.value!=frm.passWord2.value){
		alert("确认密码有误，请重新输入！");
		frm.passWord2.focus();
		return (false);
	}
	if(frm.email.value==""){
	alert("请输入电子邮件！");
	frm.email.focus();
	return (false);
	}
	var myRegex = /@.*\.[a-z]{2,6}/;
	var email = frm.email.value;
	email = email.replace(/^ | $/g,"");
	email = email.replace(/^\.*|\.*$/g,"");
	email = email.toLowerCase();
	
	//验证电子邮件的有效性
	if (email == "" || !myRegex.test(email)){
		alert ("请输入有效的E-MAIL!");
		frm.email.focus();
		return (false);
	}
	frm.action='xx.jsp';
	return true;
 }
	//是否都为数字
function isDigit(s)
{
	var patrn=/^[0-9]{1,20}$/;
	if (!patrn.exec(s)) return false
	return true
}
//验证电话号码位数
function isTel(s)
{
	return (s.length>=7 && s.length<=11)
}
</script>
<form  name="form1" method="post"  onSubmit="return sub_mit(this)"></form>