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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> 无标题 1 </title>
<script type="text/javascript" language="javascript">
function test1()
{
if(document.getElementById("txtUserName").value=="")
{
document.getElementById("txtUserName").focus();
alert("notis1");
return false;
}
var filter=/^[.A-Za-z0-9_-]{6,20}$/;
if (!filter.test(document.getElementById("txtUserName").value)){
document.getElementById("txtUserName").focus();
document.getElementById("txtUserName").select();
alert("notis2");
return false;
}
return true;
}
function test2(){
if(document.getElementById("txtUserPass").value=="")
{
document.getElementById("txtUserPass").focus();
alert("notis3");
return false;
}
var filter=/^[.A-Za-z0-9_-]{6,20}$/;
if (!filter.test(document.getElementById("txtUserPass").value)){
document.getElementById("txtUserPass").focus();
document.getElementById("txtUserPass").select();
alert("notis4");
return false;
}
return true;
}
</script>
</head>
<body>
用户名: <input type="text" onchange="test1()" name="txtUserName" id="txtUserName"/> <br>
密 码: <input type="text" onchange="test2()" name="txtUserPass" id="txtUserPass"/> <br>
<input type="submit" value="提交" onclick="test1();test2();"/>
</body>
</html>