Bootstrap popover 实现鼠标移入移除显示隐藏功能方法

var strContent = '<div class="media"><div class="position-left media-left"><img class="img-circle" src="https://www.gxlcms.com/assets/images/avatar.jpg">'+
 '</div>'+
 '<div class="media-body">'+
 '<h4 class="media-title">小标题</h4>'+
 '<p><strong>张三</strong> <span class="label label-primary">管理员</span></p>'+
 '</div>'+
 '</div>';
$( 'li#user_avatar' ).popover({
 trigger:'manual',
	placement:'bottom',
	html:true,
	container:'#bs-example-navbar-collapse-1',
	content:strContent,
}).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' ) 
 }
 }, 100); 
});