计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)
String.prototype.len=function(){return this.replace([^\x00-\xff]/g,"aa").length;}String.prototyp
计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)
String.prototype.len=function(){return this.replace([^\x00-\xff]/g,"aa").length;}String.prototyp