/// <reference path="jquery/jquery-1.3.2-vsdoc.js" />

String.prototype.isEmail = function() {
    var string = this;
    var partn = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
    if (!partn.exec(string)) {
        return false;
    }
    return true;
};
String.prototype.isNumber = function() {
    var string = this;
    var partn = /^[0-9]+$/;
    if (!partn.exec(jQuery.trim(string))) {
        return false;
    }
    return true;
};
String.prototype.isNumberAndNotZero = function() {
    var string = this;
    if (jQuery.trim(string) == "0") {
        return false;
    } else if (!string.isNumber()) {
        return false;
    }
    return true;
};
String.prototype.isUrl = function() {
    var string = this;

    var strRegex = "^((https|http|ftp|rtsp|mms)?://)"
        + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" //ftp的user@ 
        + "(([0-9]{1,3}.){3}[0-9]{1,3}" // IP形式的URL- 199.194.52.184 
        + "|" // 允许IP和DOMAIN（域名）
        + "([0-9a-z_!~*'()-]+.)*" // 域名- www. 
        + "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]." // 二级域名 
        + "[a-z]{2,6})" // first level domain- .com or .museum 
        + "(:[0-9]{1,4})?" // 端口- :80 
        + "((/?)|" // a slash isn't required if there is no file name 
        + "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
    var re = new RegExp(strRegex);

    return re.test(string);


};