禁止选中文本事件

obj.on(‘click‘,‘.arrow‘,function(ev){
                    console.log(‘click‘);
                    ev.stopPropagation();
                    ev.preventDefault();
                    var rel = $(this).attr(‘rel‘);
                    if( rel && rel <= totalPage && rel>0 ){
                        getEnjoyData(rel);    
                    };
                    document.onselectstart= function(){return false;};//禁止文本选中
                });