function turnOn(imgName){
	if (document.images && (preloadFlag == true)){
		document[imgName].src = "../images/" + imgName + "_on.gif";
	}
}
function turnOff(imgName){
	if (document.images && (preloadFlag == true)){
		document[imgName].src = "../images/" + imgName + ".gif";
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		imgNames = ["ip_nav_home","ip_nav_paintings","ip_nav_fpc","ip_nav_functional","ip_nav_studio","ip_nav_press","ip_nav_resume"];
		for (var i=0; i<imgNames.length; i++){
			eval(imgNames[i] + "_on = new Image(); " + imgNames[i] + "_on.src = '../images/" + imgNames[i] + "_on.gif';");
		}
		preloadFlag = true;
	}
}