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Javascript : Validate file upload

/ Published in: PHP
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Image file upload, javascript

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Copy this code and paste it in your HTML 
  1. <script language="javascript">
  2.         function Checkfiles()
  3.         {
  4.         var fup = document.getElementById('logo1');
  5.         var fileName = fup.value;
  6.         var ext = fileName.substring(fileName.lastIndexOf('.') + 1);
  7.         if(ext == "gif" || ext == "GIF" || ext == "JPEG" || ext == "jpeg" || ext == "jpg" || ext == "JPG" || ext == "png" || ext == "PNG")
  8.         {
  9.         return true;
  10.         } 
  11.         else
  12.         {
  13.         alert("Upload JPG, JPEG, PNG, GIF images only");
  14.         fup.focus();
  15.         return false;
  16.         }
  17.         }
  18. </script>
  19.  
  20.  
  21. onchange="Checkfiles()"

URL: http://programming-tut.blogspot.in/2010/02/javascript-validate-file-upload.html

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