function viewPic(img,h,w)
   {       
       picfile = new Image(); 
       picfile.src =(img); 
       //fileCheck(img);
 
    // If image width can not
  
    // be determined, open a default size.
       if( (picfile.width!=0) && (picfile.height!=0) ) { 
           //makeWindow(img,300,300);
            makeWindow(img,h+18,w+18);
         // Else - give it a specified width
       }    
   }
  
  function makeWindow(img,ht,wd)
   {   
   
       var args= "height=" + ht + ",innerHeight=" + ht;
       args += ",width=" + wd + ",innerWidth=" + wd;
  
      if (window.screen) 
       { 
          var avht = screen.availHeight; 
          var avwd = screen.availWidth;
          var xcen = (avwd - wd) / 2; 
          var ycen = (avht - ht) / 2;
           args += ",left=" + xcen + ",screenX=" + xcen;
           args += ",top=" + ycen + ",screenY=" + ycen + ",resizable=yes";         
       }
       return window.open(img, '', args); 
   }