87,955
社区成员
![](https://csdnimg.cn/release/cmsfe/public/img/topic.427195d5.png)
![](https://csdnimg.cn/release/cmsfe/public/img/me.40a70ab0.png)
![](https://csdnimg.cn/release/cmsfe/public/img/task.87b52881.png)
![](https://csdnimg.cn/release/cmsfe/public/img/share-circle.3e0b7822.png)
if(title[index].innerHTML.length > num){
title[index].innerHTML = title[index].innerHTML.substring(0,num)
}
function keyAction(obj) {
var textbox = document.getElementById('obj');
var sel = window.getSelection();
var range = document.createRange();
range.selectNodeContents(textbox);
range.collapse(false);
sel.removeAllRanges();
sel.addRange(range);
}
谢谢 已经解决 用这个函数在截取完调用