function preload()
{
	preload_image_01 = new Image();
	preload_image_02 = new Image();
	preload_image_03 = new Image();
	preload_image_04 = new Image();
	preload_image_05 = new Image();
	preload_image_06 = new Image();
	preload_image_07 = new Image();
	preload_image_08 = new Image();
	preload_image_09 = new Image();
	preload_image_10 = new Image();
	preload_image_11 = new Image();
	preload_image_12 = new Image();
	preload_image_13 = new Image();
	preload_image_14 = new Image();	
	preload_image_01.src = "images/nav/lnav_construction_over.jpg";
	preload_image_02.src = "images/nav/lnav_hospitality_over.jpg";
	preload_image_03.src = "images/nav/lnav_manufactoring_over.jpg";
	preload_image_04.src = "images/nav/lnav_medical_over.jpg";
	preload_image_05.src = "images/nav/lnav_retail_over.jpg";
	preload_image_06.src = "images/nav/lnav_transportation_over.jpg";
	preload_image_07.src = "images/nav/lnav_wood_over.jpg";
	preload_image_08.src = "images/nav/rnav_property_over.jpg";
	preload_image_09.src = "images/nav/rnav_empbenefits_over.jpg";
	preload_image_10.src = "images/nav/rnav_workerscomp_over.jpg";
	preload_image_11.src = "images/nav/rnav_suretybonds_over.jpg";
	preload_image_12.src = "images/nav/rnav_lossprevention_over.jpg";
	preload_image_14.src = "images/nav/rnav_homeauto_over.jpg";
}


function highlight(prefix, button) {
	document.getElementById(button).src = "images/nav/"+prefix+"_"+button+"_over.jpg";
	
}

function dim(prefix, button) {
	document.getElementById(button).src = "images/nav/"+prefix+"_"+button+".jpg";
	
}