var imgSrc="http://www.zangocreative.com/"
	if (document.images) {
	  image21on = new Image();
	  image21on.src = "images/nav/samples.gif";
	  image24on = new Image();
	  image24on.src = "images/nav/client.gif";

	  
	  image21roll = new Image();
	  image21roll.src = "images/nav/samples_roll.gif";
	  image24roll = new Image();
	  image24roll.src = "images/nav/client_roll.gif";

	}
	
	function changeImages() {
	  if (document.images) {
	    for (var i=0; i<changeImages.arguments.length; i+=2) {
	      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
	    }
	  }
	}