var mouseX = 0;
var mouseY = 0;
var menuselector='.menu>li, .sitemap li a';
$(document).ready(function(){
    $(menuselector).mousemove( function(e) {
        mouseX = e.pageX;
        mouseY = e.pageY;
    });
    $(menuselector).mouseenter(function(){
        var colorbar=$('#supmain2');
        var newpos=mouseX*1+mouseY*1;
        colorbar.stop().animate({backgroundPosition:newpos+'px 50%'},{duration:750});
    });
});