NAVarr = new Array("hom", "abo", "con");
if (document.images) {
	for (var NAVitem in NAVarr) { 
		 for (var NAVicount=0; NAVicount < 2; NAVicount++) { 
				eval("b" + NAVarr[NAVitem] + NAVicount + " = new Image()");
				eval("b" + NAVarr[NAVitem] + NAVicount + ".src = 'assets/nav-" + NAVarr[NAVitem] + "-" + NAVicount + ".gif'");
		 } 
	} 
}

function BturnOn(imageName) {
	if (document.images) {
		var imageNumber = "";
		if (arguments.length > 1) imageNumber = arguments[1];
		document [imageName + imageNumber].src = eval("b" + imageName + "1.src");
	}
}

function BturnOff(imageName) {
	if (document.images) {
		var imageNumber = "";
		if (arguments.length > 1) imageNumber = arguments[1];
		document [imageName + imageNumber].src = eval("b" + imageName + "0.src");
	}
}

jQuery.preloadImages = function(){
		for(var i = 0; i<arguments.length; i++){
			jQuery("<img>").attr("src", arguments[i]);
	 	}
	}
	
$.preloadImages("assets/a_square1.jpg","assets/a_square2.jpg","assets/a_square3.jpg","assets/a_square4.jpg","assets/a_square5.jpg","assets/a_square6.jpg","assets/a_square7.jpg","assets/a_square8.jpg","assets/a_square9.jpg","assets/b_square1.jpg","assets/b_square2.jpg","assets/b_square3.jpg","assets/b_square4.jpg","assets/b_square5.jpg","assets/b_square6.jpg","assets/b_square7.jpg","assets/b_square8.jpg","assets/b_square9.jpg","assets/c_square1.jpg","assets/c_square2.jpg","assets/c_square3.jpg","assets/c_square4.jpg","assets/c_square5.jpg","assets/c_square6.jpg","assets/c_square7.jpg","assets/c_square8.jpg","assets/c_square9.jpg","assets/z_square.jpg");