/*
This file contains other functions and logic to perform
*/

// exclude old browsers
if (!document.getElementById){
	top.location.replace('info/browser.html');
}


// rollover image function
function changeImage(image_name,image_src) {
   	document.images[image_name].src = image_src;
}

// preload images
function preloadImages(){
	
	if (document.images){
	
		var nav_floor_over = new Image(74,30);
		nav_floor_over.src = "http://216.89.110.160/graphics/nav/floor_on.gif";
		
		var nav_carpet_over = new Image(84,30);
		nav_carpet_over.src = "http://216.89.110.160/graphics/nav/carpet_on.gif";
		
		var nav_restroom_over = new Image(90,30);
		nav_restroom_over.src = "http://216.89.110.160/graphics/nav/restroom_on.gif";
		
		var nav_green_over = new Image(98,30);
		nav_green_over.src = "http://216.89.110.160/graphics/nav/green_on.gif";
		
		var nav_handtools_over = new Image(74,30);
		nav_handtools_over.src = "http://216.89.110.160/graphics/nav/handtools_on.gif";
		
		var nav_chemicals_over = new Image(119,30);
		nav_chemicals_over.src = "http://216.89.110.160/graphics/nav/chemicals_on.gif";
		
		var nav_exterior_over = new Image(84,30);
		nav_exterior_over.src = "http://216.89.110.160/graphics/nav/exterior_on.gif";
		
		var nav_technology_over = new Image(76,30);
		nav_technology_over.src = "http://216.89.110.160/graphics/nav/technology_on.gif";
		
		var nav_business_over = new Image(138,30);
		nav_business_over.src = "http://216.89.110.160/graphics/nav/business_on.gif";
		
		var nav_legal_over = new Image(105,30);
		nav_legal_over.src = "http://216.89.110.160/graphics/nav/legal_on.gif";
		
		var nav_more_over = new Image(48,30);
		nav_more_over.src = "http://216.89.110.160/graphics/nav/more_on.gif";
		
	} else {
		return;
	}
	
}

// event handler used for the navigation rollovers
sfHover = function(){
	var sfEls = document.getElementById("mainNav").getElementsByTagName("li");
	for (var i = 0; i < sfEls.length; i++){
		sfEls[i].onmouseover = function(){
			this.className += " sfhover";
		}
		sfEls[i].onmouseout = function(){
			this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);