[原创] 增加 javascript 的 trim 函数
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String.prototype.trim = function(){
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return this.replace(/(^\s*)|(\s*$)/g, "");
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}
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String.prototype.ltrim = function(){
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return this.replace(/(^\s*)/g,"");
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}
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String.prototype.rtrim = function(){
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return this.replace(/(\s*$)/g,"");
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}
![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
或者:
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function trim(str){ //删除左右两端的空格
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return str.replace(/(^\s*)|(\s*$)/g, "");
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}
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function ltrim(str){ //删除左边的空格
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return str.replace(/(^\s*)/g,"");
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}
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function rtrim(str){ //删除右边的空格
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return str.replace(/(\s*$)/g,"");
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}
![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/InBlock.gif)
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![](http://www.phpweblog.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)