function openimage(image)
      {
	  var newImg = new Image();
	 newImg.src = 'b/'+image.name+'_big.jpg';
	var height = newImg.height;
	var width = newImg.width;
	if(height == 0 || width == 0)
	{
	  height = 800;
	  width = 800;
	 }
	
	 var left = parseInt((screen.availWidth/2) - (width/2));
    var top = parseInt((screen.availHeight/2) - (height/2));
	var windowsettings = "width=" + width + ",height=" + height + ",status,resizable=yes,left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top;
	var windowimage = '<img src="'+newImg.src+'" onclick="self.close();"  onMouseOver="style.cursor=\'pointer\';">';
	OpenWindow=window.open('', 'Zoom', windowsettings);
	OpenWindow.document.write(windowimage);
	OpenWindow.document.close()
	self.name="main"
     }