<form action="xx.asp" onsubmit="return (text1.value==text2.value)">

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  1.   

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT="">
    </HEAD><BODY>
    <FORM METHOD=POST ACTION="">
    <INPUT TYPE="password" NAME="pwd1">
    <INPUT TYPE="password" NAME="pwd2">
    <INPUT TYPE="submit" onclick="return checkpwd();">
    </FORM>
    </BODY>
    </HTML>
    <SCRIPT LANGUAGE="JavaScript">
    <!--
    function checkpwd()
    {
    if(document.forms[0].elements['pwd1'].value==document.forms[0].elements['pwd2'].value)
    {
    return true;
    }
    else
    {
    alert("密码不相同!");
    return false;
    } }
    //-->
    </SCRIPT>