function homepageNavImagePreload(){
	var images = new Array();
	images[0] = "images/nav/homepage_our_commitment.jpg";
	images[1] = "images/nav/homepage_our_commitment_highlight.jpg";
	images[2] = "images/nav/homepage_benefits_advisor.jpg";
	images[3] = "images/nav/homepage_benefits_advisor_highlight.jpg";
	images[4] = "images/login_button_hover_green.jpg";
	images[5] = "images/login_button_green.jpg";
	
	ImagePreload(images);
}

function ImagePreload(imgArray){
	var i = 0;
	var	imageObj = new Image();
	
	if(imgArray == null)
		return;
		
	// start preloading
	for(i=0; i<=imgArray.length; i++){
		imageObj.src=imgArray[i]; 
	}
}

function swapImage(obj, src){
	if(obj == null)
		return;
		
	obj.src = src;
}