/**
 * @author tbianco
 */
sfHover = function()
{
	//alert('sfHover was called');
	//var sfEls = document.getElementById("top_menu").getElementsByTagName("LI");
	var sfEls = document.getElementById("nav").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);



function swap_img(img_el,state)
{
	var img_str = $(img_el).src;
	var img_ext_start_pos = img_str.lastIndexOf('.');
	var img_folder_loc = img_str.lastIndexOf('/');
	var file_ext = img_str.substr(img_ext_start_pos,4);
	var file_location = img_str.substr(0,img_folder_loc)+'/';

	if(state == 'off'){
		$(img_el).src = file_location + img_el + '_off' + file_ext;

	}
	else if(state == 'on'){
		$(img_el).src = file_location + img_el + '_on' + file_ext;
	}
}