$(document).ready(function(){
    $("#aboutushead").hover(function() {
        $("#divaboutus").stop(true, true).animate({opacity: "show"}, "fast");
        }, function() {
            $("#divaboutus").animate({opacity: "hide"}, "fast");
    });
});

$(document).ready(function(){
    $("#stemhead").hover(function() {
        $("#divstem").stop(true, true).animate({opacity: "show"}, "fast");
        }, function() {
            $("#divstem").animate({opacity: "hide"}, "fast");
    });
});

$(document).ready(function(){
    $("#projectshead").hover(function() {
        $("#divprojects").stop(true, true).animate({opacity: "show"}, "fast");
        }, function() {
            $("#divprojects").animate({opacity: "hide"}, "fast");
    });
});