js经验1

1. input 获得焦点  focus();

2.获得文档的的title

_title = document.title;

3.定时检查删除dom定时器

var deleteDomInterval = null;          /* 定时检查删除dom定时器*/

$(function() {

deleteDomInterval = setInterval(deleteDom,5000);      /* 5秒 */

});

 

/* 检查如果消息过多就删除几个 */

//tn父容器的id  自己是div，因定时增加所以删除的也是div

          function deleteDom(){

                    while($("#tn>div" ).length > 4){

                        $( "#tn>div:eq(0)" ).remove();

                   }

          }

 

4.滑动滚动条至最底,需要的时候执行就行了

/* 滑动滚动条至最底 */

//tn是具有滚动条的div的id

          function slide(){

               var div = document.getElementById("tn");

              div.scrollTop = div.scrollHeight;

          }

 

转载于:https://www.cnblogs.com/jia1994/p/4583833.html