Monday, April 25, 2011

Check whether a HTML control exists or not 


<!DOCTYPE html>
<html> 
<head> 
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
   <title>Check whether a control exists</title> 
</head> 



<body> 


   <script type="text/javascript">


       function check() {
           if (document.getElementById('btn_yasser')) {
               alert('Exists !');
           }
           else {
               alert('Not present');
           }
       }


   </script> 


   <input type="button" id="btn_yasser" value="click me" onClick="check();" /> 


</body> 


</html>
The same could be used for ASP controls.
Hope this helps.
Posted by Yasser R Shaikh at 3:07 AM
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2011 ·Code-Studio by yrus.