//Preload images
if (document.images) {	
	var nav_collection = new Image();
	nav_collection.src = "i/nav_collection.gif";
	var nav_collection_h = new Image();
	nav_collection_h.src = "i/nav_collection_h.gif";
	
	var nav_about = new Image();
	nav_about.src = "i/nav_about.gif";
	var nav_about_h = new Image();
	nav_about_h.src = "i/nav_about_h.gif";
	
	var nav_applications = new Image();
	nav_applications.src = "i/nav_applications.gif";
	var nav_applications_h = new Image();
	nav_applications_h.src = "i/nav_applications_h.gif";
	
	var nav_faqs = new Image();
	nav_faqs.src = "i/nav_faqs.gif";
	var nav_faqs_h = new Image();
	nav_faqs_h.src = "i/nav_faqs_h.gif";
	
	var nav_contactus = new Image();
	nav_contactus.src = "i/nav_contactus.gif";
	var nav_contactus_h = new Image();
	nav_contactus_h.src = "i/nav_contactus_h.gif";
	
	var nav_patterns = new Image();
	nav_patterns.src = "i/nav_patterns.jpg";
	var nav_patterns_h = new Image();
	nav_patterns_h.src = "i/nav_patterns_h.jpg";
	
	var nav_metallics = new Image();
	nav_metallics.src = "i/nav_metallics.jpg";
	var nav_metallics_h = new Image();
	nav_metallics_h.src = "i/nav_metallics_h.jpg";
	
	var nav_effects = new Image();
	nav_effects.src = "i/nav_effects.jpg";
	var nav_effects_h = new Image();
	nav_effects_h.src = "i/nav_effects_h.jpg";
	
	var nav_emboss = new Image();
	nav_emboss.src = "i/nav_emboss.jpg";
	var nav_emboss_h = new Image();
	nav_emboss_h.src = "i/nav_emboss_h.jpg";

	var nav_botanicals = new Image();
	nav_botanicals.src = "i/nav_botanicals.jpg";
	var nav_botanicals_h = new Image();
	nav_botanicals_h.src = "i/nav_botanicals_h.jpg";

	var nav_rockslab = new Image();
	nav_rockslab.src = "i/nav_rockslab.jpg";
	var nav_rockslab_h = new Image();
	nav_rockslab_h.src = "i/nav_rockslab_h.jpg";		
}

//Image rollover function
function rollOn(imgSrc1) {
	if (document.images) {
		document.images[imgSrc1].src = "i/" + imgSrc1 + "_h.gif";
	}
}

//Image rolloff function
function rollOff(imgSrc1) {
	if (document.images) {
		document.images[imgSrc1].src = "i/" + imgSrc1 + ".gif";
	}
}

//Image (jpeg) rollover function
function rollOnJ(imgSrc1) {
	if (document.images) {
		document.images[imgSrc1].src = "i/" + imgSrc1 + "_h.jpg";
	}
}

//Image (jpeg) rolloff function
function rollOffJ(imgSrc1) {
	if (document.images) {
		document.images[imgSrc1].src = "i/" + imgSrc1 + ".jpg";
	}
}

function switchClass(whichEl,whichClass,whichClass2,imgSrc1) {
	document.getElementById('patternTable'+whichEl).className=whichClass;
	document.getElementById('patternLink'+whichEl).className=whichClass2;
	if (document.images) {
		document.images['patternArrow'+whichEl].src = "i/arrow_right_" + imgSrc1 + ".gif";
	}
}