function viewPic(img)
{ 	
 picfile = new Image();
 picfile.src =(img);
 fileCheck(img);
}

function fileCheck(img)
{ 	
 if( (picfile.width!=0) && (picfile.height!=0) )
 {
  makeWindow(img);
 }
 else
 {
  funct="fileCheck('"+img+"')";
  interval=setTimeout(funct,50);
 }
}

function makeWindow(img)
{ 	
 ht = picfile.height + 20;
 wd = picfile.width + 20;

 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);
}