$.fn.overstate = function(disable){
	this.each(function(){
		$("<img />").attr("src", $(this).attr("srcover"));
		if(!$(this).is("[srcout]")) $(this).attr("srcout", $(this).attr("src"));
		$(this)
			.unbind("mouseover")
			.unbind("mouseout")	
			.mouseover(function(){
				if(disable!="disable") $(this).attr("src", $(this).attr("srcover"));
			})
			.mouseout(function(){
				if(disable!="disable") $(this).attr("src", $(this).attr("srcout"));
			});
	});
	return this;
}