简单正则替换
var rega=new RegExp(" ","g"); //创建正则RegExp对象
ntrstr=ntrstr.replace(rega,"");
var regb=new RegExp(" ","g"); //创建正则RegExp对象
ntrstr=ntrstr.replace(regb,"");
var regc=new RegExp(" ","g"); //创建正则RegExp对象
ntrstr=ntrstr.replace(regc,"");