function moveSpace() {
var str = " abc defg";
alert(str.replace(/[ ]/g, ""));
}
moveSpace();
2.javascript过滤中文：
var title ="字符串zifuchuan"
var reg=/[u4E00-u9FA5]/g;
var result=title.replace(reg,'');
alert(result);
3. javascript去掉字符串两端的空格
String.prototype.trim=function (){return this.replace(/(^/s*)|(/s*$)/g,'');}
4.javascript去掉字符串所以空格
String.prototype.sTrim = function (){return this.replace(//s/g, '');}