function iO (obj) {
	this.ovr = new Image();
	this.ovr.src = "../img/"+obj+"_ovr.gif";
	this.nml = new Image();
	this.nml.src = "../img/"+obj+".gif";
}

var btn_discoverMore = new iO("btn_discoverMore");
var btn_signUpForFree = new iO("btn_signUpForFree");
var btn_viewEntireSchedule = new iO("btn_viewEntireSchedule");

function iS(o,l) {
	if (l=="1") {
		document.getElementById(o).src = eval(o+".ovr.src");
	} else {
		document.getElementById(o).src = eval(o+".nml.src");
	}
}