$(document).ready(function() {
$("#topnav li").prepend("<span></span>"); //Throws an empty span tag right before the a tag
$("#topnav li").each(function() { //For each list item...
var linkText = $(this).find("a").html(); //Find the text inside of the <a> tag 
$(this).find("span").show().html(linkText); //Add the text in the <span> tag
}); 
$("#topnav li").hover(function() { //On hover...
$(this).find("span").stop().animate({
marginTop: "-57" //Find the <span> tag and move it up 40 pixels 
}, 250);
} , function() { //On hover out...
$(this).find("span").stop().animate({ 
marginTop: "0"  //Move the <span> back to its original state (0px)
}, 250); 
})
});