js限制字数，超出部分以省略号...显示

//用js限制字数，超出部分以省略号...显示
function LimitNumber(txt,idName) {
    var str = txt;
    str = str.substr(0,20) + '...' ;
    var id=document.getElementById(idName);
    id.innerText=str;
}

 

转载于:https://www.cnblogs.com/xushengguan/p/8616379.html