在javascript中如何去掉空字符(空格的字符串)? str=" ddddd ddddddddd dddddd";str=str.replace(/ /g,'')alert(str) 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 Javascript中为String对象添加 Trim() 方法<script language=Javascript> //自己动手为string添加TrimString.prototype.Trim = function(){return this.replace(/^\s+|\s+$/g,"");}String.prototype.Ltrim = function(){return this.replace(/^\s+/g, "");}String.prototype.Rtrim = function(){return this.replace(/\s+$/g, "");}var str = " meizz ";alert(str.Trim());alert(str.Ltrim());alert(str.Rtrim());</script> wanghr100(灰豆宝宝.net)的从结果看不出来区别:这样就能看出区别:<script language=Javascript> //自己动手为string添加TrimString.prototype.Trim = function(){return this.replace(/^\s+|\s+$/g,"");}String.prototype.Ltrim = function(){return this.replace(/^\s+/g, "");}String.prototype.Rtrim = function(){return this.replace(/\s+$/g, "");}var str = " meizz ";alert("AAA"+str.Trim()+"BBB");alert("AAA"+str.Ltrim()+"BBB");alert("AAA"+str.Rtrim()+"BBB");</script> alert(" a bb ccc dddd ".replace(/ /g,'')) <SCRIPT LANGUAGE="JavaScript">function trim(str){ return str.replace(/^\s*(.*?)\s*$/, "$1");}var a = " sdffasdf sdf sdfasdf ";var b = trim(a);alert('#' + a + '#\n#' + b + '#');</SCRIPT> js跨域问题怎么解决? shopex 跟jquery不兼容怎么办? 求助:JS代码问题,郁闷死我了???? JS基础问题 Web MSN是怎么实现的? 打印怎么设置纸张大小? 滚动的左右控制为什么不灵 EXT 的 Treegrid 需要什么格式的JSON数据 ? 自认为有点难的问题,求解!! 请问如何打开一个子窗口,然后按下子窗口中的一个按钮传递一个值到父窗口去 目标:想在iframe里显示纯文本,与textarea里的一模一样(第三次) javascript对网页显示速度的影响
<script language=Javascript> //自己动手为string添加Trim
String.prototype.Trim = function(){return this.replace(/^\s+|\s+$/g,"");}
String.prototype.Ltrim = function(){return this.replace(/^\s+/g, "");}
String.prototype.Rtrim = function(){return this.replace(/\s+$/g, "");}
var str = " meizz ";
alert(str.Trim());
alert(str.Ltrim());
alert(str.Rtrim());
</script>
这样就能看出区别:
<script language=Javascript> //自己动手为string添加Trim
String.prototype.Trim = function(){return this.replace(/^\s+|\s+$/g,"");}
String.prototype.Ltrim = function(){return this.replace(/^\s+/g, "");}
String.prototype.Rtrim = function(){return this.replace(/\s+$/g, "");}
var str = " meizz ";
alert("AAA"+str.Trim()+"BBB");
alert("AAA"+str.Ltrim()+"BBB");
alert("AAA"+str.Rtrim()+"BBB");
</script>
function trim(str)
{
return str.replace(/^\s*(.*?)\s*$/, "$1");
}var a = " sdffasdf sdf sdfasdf ";
var b = trim(a);
alert('#' + a + '#\n#' + b + '#');
</SCRIPT>