var or_image = null;
var or_caption = null;
  function swapImage(src, caption){
  	if (or_image == null)
  		or_image = document.getElementById("image").src;
  	if (or_caption == null)
  		or_caption = document.getElementById("caption").innerHTML;
  		
  	rExp = /60_40/gi;
	rReplace = "180_120";
	
  	document.getElementById("image").src = src.replace(rExp, rReplace);
  	document.getElementById("caption").innerHTML = caption;
  }
  function restoreImage(){
  	document.getElementById("image").src = or_image;
  	document.getElementById("caption").innerHTML = or_caption;
  }
  function openPopup(url,w,h) { 
		var parString = "width=" + w + ",height=" + h
			+ ",toolbar=0,location=0,directories=0"
			+ ",status=0,menuBar=0,scrollbars=no,resizable=0,left="+(screen.width-w)/2+",top="+(screen.height-h)/2;
		var winPop = window.open(url,"",parString);
		winPop.focus();
	}