tab jquery

**** css:

.col_left > ul > li.active {

    -moz-border-bottom-colors: none;

    -moz-border-left-colors: none;

    -moz-border-right-colors: none;

    -moz-border-top-colors: none;

    background: #fff none repeat scroll 0 0;

    border-color: #ccc -moz-use-text-color #ccc #ccc;

    border-image: none;

    border-style: solid none solid solid;

    border-width: 1px;

}

****Jquery

<script type="text/javascript">

$(document).ready(function($) {

$(".menu_m_m li").click(function(){

      $("#content_sid").load("url&sid="+$(this).attr("alt")+"&ngonngu=<?php echo vietnam ?>");

     $(".tool-1").hide();

//$(".tool-1").html("");

//$(".name_cid").text($(this).children("a").text());

  current_class=$(this).index()+1;

$(".menu_m_m li").removeClass("active");

 $(this).addClass("active");

var obj =$(".menu_m_m li");

for(i=1;i<obj.length;i++){

     if($(".menu_m_m li:nth-child("+i+")").attr("class")=="active"){

current_class=i

break;

    }

}

return false;

});

});

</script>
**** chú ý
ul có width dài hơn class menu_m_m là 1px
class menu_m_m có background màu trắng