str为要去除空格的字符串:去除所有空格:   str   =   str.replace(/\s+/g,"");       去除两头空格:   str   =   str.replace(/^\s+|\s+$/g,"");去除左空格：str=str.replace( /^\s*/, '');去除右空格：str=str.replace(/(\s*$)/g, "");SCRIPT LANGUAGE="JavaScript">    
                                访问yaosansi.com 去除所有空格: str = str.replace(/\s+/g,"");去除两头空格: str = str.replace(/^\s+|\s+$/g,"");去除空格(TimeSheet用过)arg0=arg0.replace(/\s+$|^\s+/g,""); 来源：http://www.cnblogs.com/fumj/p/3406420.html