js扩展

var zj = zj || {};

/**
 * 字符串转json对象
 */
zj.toJson = function(result) {
    if (typeof result == "string") {
        return eval("(" + result + ")");
    } else {
        return result;
    }
}

/**
 * @author 张剑 使用方法：zj.formatString('字符串{0}字符串{1}字符串','第一个变量','第二个变量');
 * 
 * @returns 格式化后的字符串
 */
zj.formatString = function(str) {
    for (var i = 0; i < arguments.length - 1; i++) {
        str = str.replace("{" + i + "}", arguments[i + 1]);
    }
    return str;
};

/**
 * @author 张剑
 * 
 * 接收一个以逗号分割的字符串，返回List，list里每一项都是一个字符串
 * 
 * @returns list
 */
zj.stringToList = function(value) {
    if (typeof value == "object") {
        return value;
    } else if (value != undefined && value != '') {
        var values = [];
        console.info(value);
        var t = value.split(',');
        for (var i = 0; i < t.length; i++) {
            values.push('' + t[i]);/* 避免他将ID当成数字 */
        }
        console.info(values);
        return values;
    } else {
        return [];
    }
};

/**
 * 清空form表单
 */
zj.clearForm = function(form) {
    $(':input', form).each(function() {
        var type = this.type;
        var tag = this.tagName.toLowerCase();
        if (type == 'text' || type == 'password' || tag == 'textarea') {
            this.value = "";
        } else if (type == 'checkbox' || type == 'radio') {
            this.checked = false;
        } else if (tag == 'select') {
            this.selectedIndex = -1;
        }
    });
};

/**
 * 日期格式化
 * 
 * @param format
 * @returns
 */
Date.prototype.format = function(format) {
    var o = {
        "M+" : this.getMonth() + 1, // month
        "d+" : this.getDate(), // day
        "h+" : this.getHours(), // hour
        "m+" : this.getMinutes(), // minute
        "s+" : this.getSeconds(), // second
        "q+" : Math.floor((this.getMonth() + 3) / 3), // quarter
        "S" : this.getMilliseconds()
    }

    if (/(y+)/.test(format)) {
        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    }

    for ( var k in o) {
        if (new RegExp("(" + k + ")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
        }
    }
    return format;
}

/**
 * 在当前页面创建隐藏iframe并提交
 */
zj.iframeGet = function(url) {
    var nowDate = new Date().getSeconds() + '';
    var iframe;
    try {
        iframe = document.createElement('<iframe name="' + nowDate + '">');
    } catch (ex) {
        iframe = document.createElement('iframe');
    }
    iframe.name = nowDate;
    iframe.width = 0;
    iframe.height = 0;
    iframe.marginHeight = 0;
    iframe.marginWidth = 0;
    document.body.appendChild(iframe);
    console.info(nowDate);
    window.open(url, nowDate);
    console.info(nowDate);
}

/**
 * js进行post同步提交
 */
zj.post = function(URL, PARAMS) {
    var temp = document.createElement("form");
    temp.action = URL;
    temp.method = "post";
    temp.style.display = "none";
    for ( var x in PARAMS) {
        var opt = document.createElement("textarea");
        opt.name = x;
        opt.value = PARAMS[x];
        temp.appendChild(opt);
    }
    document.body.appendChild(temp);
    temp.submit();
}

/**
 * 获取字符串的分隔符之前部分
 */
zj.getLeftStr = function(str, delimiter) {
    return str.substring(0, str.indexOf(delimiter));
}

/**
 * 获取浏览器信息
 */
zj.getBoswerMsg = function() {
    var Sys = {};
    var ua = navigator.userAgent.toLowerCase();
    var s;
    var scan;
    (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] : (s = ua
            .match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] : (s = ua
            .match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] : (s = ua
            .match(/opera.([\d.]+)/)) ? Sys.opera = s[1] : (s = ua
            .match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

    // 以下进行测试

    if (Sys.ie) {
        scan = {
            "bowser" : "ie",
            "version" : zj.getLeftStr(Sys.ie, ".")
        };
    }
    if (Sys.firefox) {
        scan = {
            "bowser" : "firefox",
            "version" : zj.getLeftStr(Sys.firefox, ".")
        };
    }
    if (Sys.chrome) {
        scan = {
            "bowser" : "chrome",
            "version" : zj.getLeftStr(Sys.chrome, ".")
        };
    }
    if (Sys.opera) {
        scan = {
            "bowser" : "opera",
            "version" : zj.getLeftStr(Sys.opera, ".")
        };
    }
    if (Sys.safari) {
        scan = {
            "bowser" : "safari",
            "version" : zj.getLeftStr(Sys.safari, ".")
        };
    }
    console.info(scan);
    return scan;
}

zj.formatFloat = function(num, pos) {
    return Math.round(num * Math.pow(10, pos)) / Math.pow(10, pos);
}