Spry.Utils.addLoadListener(function()
{
	MM_preloadImages('../IMGS/HOME/box01_h.jpg','../IMGS/HOME/box02_h.jpg','../IMGS/HOME/box03_h.jpg','../IMGS/HOME/box04_h.jpg')
	for(var i=1;i<=4;i++){
		var elem = "box0" + i;
		Spry.Utils.addEventListener(elem, "mouseover", switch_bg_on, false);
		Spry.Utils.addEventListener(elem, "mouseout", switch_bg_off, false);
	}
});

function switch_bg_on() {
	this.style.backgroundImage='url(../IMGS/HOME/'+this.id+'_h.jpg)';
}
function switch_bg_off() {
	this.style.backgroundImage='url(../IMGS/HOME/'+this.id+'.jpg)';
}