鼠标悬停到一个按钮上或者链接上,展示下div

<a class="kc-slys" onmouseover="MM_over(this)" onmouseout="MM_out(this)" style="">演示演示演示<div id="popup" style="left: -65px; display: none;"><ul><li><p onclick="javascript:sl(5162,11,"Y");">菜单三</p></li><li><p onclick="javascript:sl(5163,11,"Y");">caidane</p></li><li><p onclick="javascript:sl(5164,11,"Y");">菜单三</p></li></ul></div></a>


//子菜单鼠标获得焦点function MM_over(mmObj) {    console.log(mmObj)    var $mmObj=$(mmObj);      $mmObj.css("position","relative");    var $mSubObj= $mmObj.children().first();    var $td=$mSubObj.parent().parent();    if( $td.children().length=='3'){    $mSubObj.attr("style","left:-65px;");    }    $mSubObj.show();}
//菜单鼠标失去焦点function MM_out(mmObj) { var $mmObj=$(mmObj);  var $mSubObj= $mmObj.children().first();$mSubObj.hide(); $mmObj.css("position","");}