J(document).ready(function() {
		
		// Preload all rollovers
		J(".roll img").each(function() {
			// Set the original src
			rollsrc = J(this).attr("src");
			rollON = rollsrc.replace(/_none.jpg$/ig,"_over.jpg");
			J("<img>").attr("src", rollON);
		});
		
		// Navigation rollovers
		J(".roll a").mouseover(function(){
			imgsrc = J(this).children("img").attr("src");
			matches = imgsrc.match(/_over/);
			
			// don't do the rollover if state is already ON
			if (!matches) {
			imgsrcON = imgsrc.replace(/_none.jpg$/ig,"_over.jpg"); // strip off extension
			J(this).children("img").attr("src", imgsrcON);
			}
			 
	
		});
		J(".roll a").mouseout(function(){
			J(this).children("img").attr("src", imgsrc);
		
		});
		

});