<script language="javascript">
     function IdentifyingPage(IdentifyingImage)
     {
     IdentifyingImage.src="../IdentifyingPage.aspx";
     }
    
 var bln= true;
 function RunOnBeforeUnload() {
    if (bln) {window.event.returnValue = '将丢失未保存的数据!';  
    } 
 }

    </script>


<body onbeforeunload="RunOnBeforeUnload()">

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