// GENERAL-PURPOSE FUNCTION TO LOAD MULTIPLE FUNCTIONS
function addLoadEvent(func) { 
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

// CREATE TITLE TAGS ON THE FLY - WRITTEN BY RJB 8/3/06
function createTitleTags() { 
	if (!document.getElementsByTagName) return false;
	var images = document.getElementsByTagName("IMG");
	for (var i=0; i < images.length; i++) {
		var image = images[i]
		if (!image.getAttribute("TITLE")) { // Check to see whether title tag already exists.
			if (image.getAttribute("ALT")) { // Check to see whether alt tag exists and it's not empty.
				var alttext = image.getAttribute("ALT");
				if (alttext !== " ") image.setAttribute("title",alttext);
			}
		}
	}
}

// RANDOMLY DISPLAY BACKGROUND IMAGE FOR GLOBALNAV DIV - 8/19/10
function swap() {
	if (!document.getElementsByTagName) return false;
	var numimages=3;
	rndimg = new Array("/nidcr2.nih.gov/images/globalnav-bkgnd1.jpg", "/nidcr2.nih.gov/images/globalnav-bkgnd2.jpg", "/nidcr2.nih.gov/images/globalnav-bkgnd3.jpg"); 
	x=(Math.floor(Math.random()*numimages));
	randomimage=(rndimg[x]);
	document.getElementById("globalnav").style.backgroundImage = "url("+ randomimage +")"; 
}

// CAROUSEL FOR POPULAR PUBLICATIONS ON HOME PAGE - 8/23/10
$(function() {
    $(".carousel").jCarouselLite({
        btnNext: ".next",
        btnPrev: ".prev",
        visible: 3
    });
	$("#popularpublications button").show();
});

// LOAD THE FUNCTIONS
addLoadEvent(createTitleTags);
addLoadEvent(swap);