//判断页面加载完毕
document.onreadystatechange = function () {
    if (document.readyState == "complete") {
        //code...
    }
}
//判断是否全为手机
String.prototype.isMobile = function () {
    var pattern = /^0{0,1}(13[0-9]|14[6|7]|15[0-3]|15[5-9]|18[0-3]|18[5-9])[0-9]{8}$/;
    return pattern.test(this);
}
//判断是否全为中文
String.prototype.isChinese = function () {
    var pattern = /^[\u4e00-\u9fa5]+$/;
    return pattern.test(this);
}
//判断是否全为英文
String.prototype.isEnglish = function () {
    var pattern = /^[a-zA-Z]+$/;
    return pattern.test(this);
}
//判断是否为空
String.prototype.isEmpty = function () {
    var _this = this;
    if (_this == "")
        return true;
}
//清除空格
String.prototype.Trim = function () {
    return this.replace(/(^\s*)|(\s*$)/g, "");
}

/* 检测级数中是否包含此项
var ar = ["a", "b"];
if (ar.contains("a"))
alert("true");  //结果：true
*/
Array.prototype.contains = function (element) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] == element) {
            return true;
        }
    }
    return false;
}