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<html>

<head>

<title> </title>
<script language="javascript">
function check(){
    var line1=document.getElementById("line1").value;
    var line2=document.getElementById("line2").value;
    var line3=document.getElementById("line3").value;
    if((line1+line2)>line3&&(line1+line3)>line2&&(line3+line2)>line1){
        alert("Äܹ¹³ÉÈý½ÇÐÎ!");
    }else{
        alert("²»Äܹ¹³ÉÈý½ÇÐÎ!");
    }
}
</script>

</head>

<body>
<input type="text" name="line1" id="line1"> <br>
<input type="text" name="line2" id="line2" > <br>
<input type="text" name="line3" id="line3" > <br>
<input type="button" value="ÅжÏÊÇ·ñ¹¹³ÉÈý½ÇÐÎ"onclick="check()">


</body>

</html>


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<head>

</head>

<body>

<div id="main">
<p class="intro">welcome to my web site </p>
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