window.onload = title;

function title(){

	for (var i=0; i<document.links.length; i++){

		var linkObj = document.links[i];

	if (linkObj.className){

		var imgObj = document.getElementById(linkObj.className);

		if (imgObj){

			setupChange(linkObj,imgObj);

		}

	}

	}

}

function setupChange(thisLink, textImage){

	thisLink.imgToChange = textImage;

	thisLink.onmouseover = rollover;

	thisLink.overImage = new Image()
	thisLink.overImage.src = "http://www.stoneworksltd.co.uk/images/large/" + thisLink.id + "-lg.jpg";

}

function rollover(){

	this.imgToChange.src = this.overImage.src;
}