Handle window onbeforeunload function - Javascript DOM Event

Javascript examples for DOM Event:onbeforeunload

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Description

Handle window onbeforeunload function

Demo Code

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<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript">
    window.onload=function(){/*from  w  w w  .j a v  a  2  s  . com*/
     var popWindow = true;
     window.onbeforeunload = function() {
          if(popWindow == true) {
               popWindow = false;
               return "Sure?";
          }
     }
    }

      </script> 
   </head> 
   <body>  
   </body>
</html>

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