function wbMenuChange(obj) {
	obj.style.backgroundPosition = "0 -33px";
}
function wbMenuClear(obj) {
	obj.style.backgroundPosition = "0 0";
}

//main title
function mainTitleChange(obj) {
	obj.style.backgroundPosition = "0 -29px";
}
function mainTitleClear(obj) {
	obj.style.backgroundPosition = "0 0";
}