// $Revision: #4 $

function rollOver(imgName) {
	document[imgName].src = eval(imgName + "_over.src");
}

function rollOff(imgName) {
	document[imgName].src = eval(imgName + "_off.src");
}

function navOver(imgNum) {
	imgName = "nav" + imgNum;
	divName = "pos" + imgNum;
	var tmpImg = getImg(imgName, divName);
	tmpImg.src = eval(imgName + "_over.src");
}

function navOff(imgNum) {
	imgName = "nav" + imgNum;
	divName = "pos" + imgNum;
	var tmpImg = getImg(imgName, divName);
	tmpImg.src = eval(imgName + "_off.src");
}

if (document.images) {
	//top nav preloads

	nav0_over = new Image();
	nav0_over.src = imageBaseURL + "images/topnav_home_on.gif";
	nav0_off = new Image();
	nav0_off.src = imageBaseURL + "images/topnav_home_off.gif";

	nav1_over = new Image();
	nav1_over.src = imageBaseURL + "images/topnav_institute_on.gif";
	nav1_off = new Image();
	nav1_off.src = imageBaseURL + "images/topnav_institute_off.gif";

	nav2_over = new Image();
	nav2_over.src = imageBaseURL + "images/topnav_corp_prog_on.gif";
	nav2_off = new Image();
	nav2_off.src = imageBaseURL + "images/topnav_corp_prog_off.gif";

	nav3_over = new Image();
	nav3_over.src = imageBaseURL + "images/topnav_prof_dev_on.gif";
	nav3_off = new Image();
	nav3_off.src = imageBaseURL + "images/topnav_prof_dev_off.gif";

	nav4_over = new Image();
	nav4_over.src = imageBaseURL + "images/topnav_personal_dev_on.gif";
	nav4_off = new Image();
	nav4_off.src = imageBaseURL + "images/topnav_personal_dev_off.gif";

	nav5_over = new Image();
	nav5_over.src = imageBaseURL + "images/topnav_contact_on.gif";
	nav5_off = new Image();
	nav5_off.src = imageBaseURL + "images/topnav_contact_off.gif";
}