//init main menu mouse over
$(document).ready(function(){
	mainMenu();
});


function mainMenu()
{
	$("#main_menu li").hover(
        function() { 
        	$("ul", this).animate({opacity:'show'},'fast');
        	onMenu = true;
        }, 
        function() {
        	$("ul", this).animate({opacity:'hide'},'fast');
        }
    );
}