function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
mustInitImg = true;
function initImgID() {var di = document.images; if (mustInitImg && di) { for (var i=0; i<di.length; i++) { if (!di[i].id) di[i].id=di[i].name; } mustInitImg = false;}}

function findElement(n,ly) {
	var d = document;
	if (browserVers < 4)		return d[n];
	if ((browserVers >= 6) && (d.getElementById)) {initImgID; return(d.getElementById(n))}; 
	var cd = ly ? ly.document : d;
	var elem = cd[n];
	if (!elem) {
		for (var i=0;i<cd.layers.length;i++) {
			elem = findElement(n,cd.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (i=0;i<array.length;i+=2) {
			img = null; var n = array[i];
			if (d.images) {
				if (d.layers) {img = findElement(n,0);}
				else {img = d.images[n];}
			}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (!img && d.getElementsByName) {
				var elms = d.getElementsByName(n);
				if (elms) {
					for (j=0;j<elms.length;j++) {
						if (elms[j].src) {img = elms[j]; break;}
					}
				}
			}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}



var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_home_on = newImage('images/menu/home_on.jpg');		
		pre_coalDelivery_on = newImage('images/menu/coalDelivery_on.jpg');		
		pre_ecoFriendly_on = newImage('images/menu/ecoFriendly_on.jpg');		
		pre_photoGallery_on = newImage('images/menu/photoGallery_on.jpg');		
		pre_products_on = newImage('images/menu/products_on.jpg');		
		pre_1 = newImage('images/gallery/1.jpg');		
		pre_2 = newImage('images/gallery/2.jpg');		
		pre_3 = newImage('images/gallery/3.jpg');		
		pre_4 = newImage('images/gallery/4.jpg');		
		pre_5 = newImage('images/gallery/5.jpg');		
		pre_6 = newImage('images/gallery/6.jpg');		
		pre_7 = newImage('images/gallery/7.jpg');		
		pre_8 = newImage('images/gallery/8.jpg');		
		pre_9 = newImage('images/gallery/9.jpg');		
		pre_10 = newImage('images/gallery/10.jpg');		
		pre_11 = newImage('images/gallery/11.jpg');		
		pre_12 = newImage('images/gallery/12.jpg');		
		pre_13 = newImage('images/gallery/13.jpg');		
		pre_14 = newImage('images/gallery/14.jpg');		
		pre_15 = newImage('images/gallery/15.jpg');		
		pre_16 = newImage('images/gallery/16.jpg');		
		pre_17 = newImage('images/gallery/17.jpg');		
		pre_18 = newImage('images/gallery/18.jpg');		
		pre_19 = newImage('images/gallery/19.jpg');		
		pre_20 = newImage('images/gallery/20.jpg');		
		pre_21 = newImage('images/gallery/21.jpg');		
		pre_22 = newImage('images/gallery/22.jpg');		
		pre_23 = newImage('images/gallery/23.jpg');		
		pre_24 = newImage('images/gallery/24.jpg');		
		pre_25 = newImage('images/gallery/25.jpg');		
		pre_26 = newImage('images/gallery/26.jpg');		
		pre_27 = newImage('images/gallery/27.jpg');		

		preloadFlag = true;
	}
}