$("#tabsH td.item").mouseover(function(){
var dropdown = $(this).children(":last"); 
var left = this.offsetLeft;
var top = $("#tabsH").height();
dropdown.css("left",left).css("top",top).css("display","block"); 
var height = dropdown.get(0).scrollHeight; 
if(height < 20) return;
for(var i=0;i<10;i++) 
    dropdown.stop(); 
     
dropdown.animate({height:height,opacity:0.95},"fast") 
dropdown.css("zIndex",100);  
});


$("#tabsH td.item").mouseout(function(){
var dropdown = $(this).children(".main-menu-dropdown:last"); 
for(var i=0;i<10;i++) 
    dropdown.stop(); 
dropdown.animate({height:1},"slow").animate({opacity:0},100);
dropdown.css("zIndex",99); 
});