Mine

<html>
	<head>
		<title>Register</title>

		<script language="javascript">
			function Check ()
			{
				var i;

				if (document.register.User_id=="" || document.register.User_name=="" || document.register.User_address=="" || document.register.User_phone=="" || document.register.User_email=="" || document.register.User_password=="" || document.register.User_repassword==""){
					alert ("there're still empty fields")
					return 1;
				}

				for (i=0;i<document.register.User_id.length;i++){
					if (document.register.User_name.value.charAt(i)<="a" || document.register.User_name.value.charAt(i)>="z" || document.register.User_name.value.charAt(i)<="A" || document.register.User_name.value.charAt(i)>="Z" || document.register.User_name.value.charAt(i)<="א" || document.register.User_name.value.charAt(i)>="ת"){
						alert ("there can be no number in a name");
						return 1;
					}
				}

				if (document.register.User_phone.length<0 || document.register.User_phone.length>9){
					alert ("there must be nine digits");
					return 1;
				}
				elseif (isNaN(document.register.User_phone.value)==true){
					alert ("must be a number");
					return 1;
				}

				if (document.register.User_email.value.indexof("@")==document.register.User_email.value.lastindexof("@") && document.register.User_email.value.indexof("@")!=-1){
					alert ("must be one @");
					return 1;
				}

				if (document.register.User_email.value.indexof(".")==-1){
					alert ("must be a point");
					reutrn 1;
				}

				
				for (i=1;i<document.register.User_email.length;i++){
					if ((document.register.User_email.value.charAt(i-1)=="." && (document.register.User_email.value.charAt(i)=="." || document.register.User_email.value.carAt(i)=="@")) || (document.register.User_email.value.charAt(i)=="." && document.register.User_email.value.charAt(i-1)=="@")){
						alert ("can't be two points together or a point next to @");
						return 1;
					}
				}
			}

			function PassCheck ()
			{
				if (document.register.User_password.value==""){
					alert ("must enter password first");
				}
				else{
					document.register.repassword.disabled=false;
				}
			}
		</script>
	</head>

	<body>
		<form name="register" action="/Project/ASP/Register.asp" method="post" onsubmit="Check();">
			<table>
				<tr>
					<td>id</td>
					<td><input name="User_id" type="text" /></td>
				</tr>
				<tr>
					<td>name</td>
					<td><input name="User_name" type="text" /></td>
				</tr>
				<tr>
					<td>address</td>
					<td><input name="User_address" type="text" />
				</tr>
				<tr>
					<td>phone</td>
					<td><input name="User_phone" type="text" />
				</tr>
				<tr>
					<td>email</td>
					<td><input name="User_email" type="text" /></td>
				</tr>
				<tr>
					<td>password</td>
					<td><input name="User_password" type="password" onchange="PassCheck();" /></td>
				</tr>
				<tr>
					<td>reenter password</td>
					<td><input name="repassword" type="password" disabled="disabled" /></td>
				</tr>
				<input name="authorization" type="hidden" value="2" />
			</table>
			<input type="submit" value="send" />
		</form>
	</body>
</html>