$(function() {
		$("#nav img.link").hover(
		 function()
		 {
		  this.src = this.src.replace("-off","-hover");
		 },
		 function()
		 {
		  this.src = this.src.replace("-hover","-off");
		 }
		)
    });
	
	// preloader
    $(function() {
		var nav1 = $('<img />').attr('src', 'images/nav/home-hover.gif');
		var nav2 = $('<img />').attr('src', 'images/nav/contact-us.gif');
		var nav3 = $('<img />').attr('src', 'images/nav/preparations-hover.gif');
		var nav4 = $('<img />').attr('src', 'images/nav/product-fees-hover.gif');
		var nav5 = $('<img />').attr('src', 'images/nav/area-of-coverage-hover.gif');
    });