window.onload=function(){
	initImages();
};

// for preloading images and rollovers
var aryLoadImg = new Array();
var ncImgOver = '_over'; // naming convention for image files ie. "img1.jpg" rolls to "img1_over.jpg"
var ncClsRoll = 'roll'; // the class name that designates the image has rollover functionality
var ncClsRollSel = 'roll_selected'; // the class name that designates the image has rollover functionality returning to FL's selected mode

function loadImg(imgFile, imgType){
	var i = aryLoadImg.length;
	aryLoadImg[i] = new Image();
	aryLoadImg[i].src = imgFile + '.' + imgType;
	return i;
}

function swapImg(imgId, imgSrc){ if(document.images){ document.images[imgId].src = imgSrc; } }

function initImages() {
	if (!document.getElementsByTagName) return;
	var aryImages = document.getElementsByTagName('img');
	var regex_roll = new RegExp('\\b'+ncClsRoll+'\\b');
	var regex_rolls = new RegExp('\\b'+ncClsRollSel+'\\b');
	for (var i = 0; i < aryImages.length; i++) {
		var currentselid = 0;
		var thisImg = aryImages[i];
		// this is used for single image roll overs
		if(thisImg.className.match(regex_roll)){
			var imgFile = thisImg.src.substr(0, thisImg.src.length-4);
			var imgType = thisImg.src.substr(thisImg.src.length-3, thisImg.src.length);
			var roll_idx = loadImg(imgFile+ncImgOver, imgType);
			thisImg.roll_idx = roll_idx;
			thisImg.onmouseover = function(){
				try {
					swapImg( this.id, aryLoadImg[this.roll_idx].src );
				} catch(e) { /*alert(e);*/ }
			};
			thisImg.onmouseout = function(){
				try {
					var regex_ncImgOver = new RegExp(ncImgOver+'\.');
					swapImg( this.id, this.src.replace(regex_ncImgOver, '.') );
				} catch(e) { /*alert(e);*/ }
			};
		} else if(thisImg.className.match(regex_rolls)){
			var imgFile = thisImg.src.substr(0, thisImg.src.length-5);
			var imgType = thisImg.src.substr(thisImg.src.length-3, thisImg.src.length);
			var roll_idx = loadImg(imgFile+ncImgOver, imgType);
			thisImg.roll_idx = roll_idx;
			thisImg.onmouseover = function(){
				try {
					swapImg( this.id, aryLoadImg[this.roll_idx].src );
				} catch(e) { /*alert(e);*/ }
			};
			thisImg.onmouseout = function(){
				try {
					var regex_ncImgOver = new RegExp(ncImgOver+'\.');
					swapImg( this.id, this.src.replace(regex_ncImgOver, 's.') );
				} catch(e) { /*alert(e);*/ }
			};
		}

	}
}

function videobox(url){
	window.open("http://www.pbs.org/mormons/view/"+url+".html","video","toolbar=no,location=no,directories=no,menubar=no,width=680,height=700,scrollbars=yes");
}