bootstrap如何設置鼠標懸停提示

<button type="button" rel="drevil" data-content="報名截止時間：'+time+'" data-container="body" data-toggle="popover" 
data-placement="bottom"></button>

$(function () { $("[data-toggle='popover']").popover(); });　　　　
　　 $("[rel=drevil]").popover({
   trigger:'manual',
   //placement : 'bottom', //placement of the popover. also can use top, bottom, 
   left or right
   //天title : '<div style="text-align:center; color:red; text-decoration:underline; 
   font-size:14px;"> Muah ha ha</div>', //this is the top title bar of the popover. 
   add some basic css
   html: 'true', //needed to show html of course
   //content : '<div id="popOverBox"><img src="http://www.hd-report.com/wp-content
   /uploads/2008/08/mr-evil.jpg" width="251" height="201" /></div>', //this is the 
   content of the html box. add the image here or anything you want really.
   animation: false
   }).on("mouseenter", function () {
   var _this = this;
   $(this).popover("show");
   $(this).siblings(".popover").on("mouseleave", function () {
    $(_this).popover('hide');
   });
   }).on("mouseleave", function () {
   var _this = this;
   setTimeout(function () {
    if (!$(".popover:hover").length) {
    $(_this).popover("hide")
    }
   }, 300);
   });