//去掉字符串首尾空格
String.prototype.Trim = function() {
var m = this.match(/^\s*(\S+(\s+\S+)*)\s*$/);
return (m == null) ? "" : m[1];
}
//验证合法手机号
String.prototype.isMobile = function() {
return (/^(?:13\d|15[89])-?\d{5}(\d{3}|\*{3})$/.test(this.Trim()));
}