js中对String去空格

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"> ???<!-- ???//出处:网上搜集 ???// Trim() , Ltrim() , RTrim() ???String.prototype.Trim = function() ???{ ???returnthis.replace(/(^\s*)|(\s*$)/g, ""); ???} ???String.prototype.LTrim = function() ???{ ???returnthis.replace(/(^\s*)/g, ""); ???} ???String.prototype.RTrim = function() ???{ ???returnthis.replace(/(\s*$)/g, ""); ???} ???//--> ???</SCRIPT> ???<input type="text" value=" ???前后都是空格 ????" id="space"> ???<input type="button" value="去前后空格" onclick="javascript:document.getElementById(‘space‘).value=document.getElementById(‘space‘).value.Trim();document.getElementById(‘space‘).select();"> ???<input type="button" value="去前空格" onclick="javascript:document.getElementById(‘space‘).value=document.getElementById(‘space‘).value.LTrim();document.getElementById(‘space‘).select();"> ???<input type="button" value="去后空格" onclick="javascript:document.getElementById(‘space‘).value=document.getElementById(‘space‘).value.RTrim();document.getElementById(‘space‘).select();"> ???<input type="button" value="还原" onclick="javascript:document.getElementById(‘space‘).value=‘ ?????前后都是空格 ????‘;"> ???<a href="http://www.yaoasnsi.com" target="_blank">访问yaosansi.com</a> 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