Javascript Common Tools Class

/*
Javascript Common Tools Class 
Email : Daniel.Chow.Tech@Hotmail.Com
Blog : http://www.cnblogs.com/DanielChow
*/

// 2010-2-20 update

var Js = new Object;
Js.IsDebug = true;
Js.Domain = "127.0.0.1";
Js.NetUrl = "http://127.0.0.1";
Js.Locale = "/";
Js.CopyRight = "(C) Your.COM";
Js.Event = new Object;
Js.Event.add = function(o, t, f) {
    if (o.addEventListener) {
        o.addEventListener(t, f, false);
    } else if (o.attachEvent) {
        o.attachEvent("on" + t, f);
    } else {
        o["on" + t] = f;
    }
};
Js.Event.remove = function(o, t, f) {
    if (o.removeEventListener) {
        o.removeEventListener(t, f, false);
    } else if (o.detachEvent) {
        o.detachEvent("on" + t, f);
    } else {
        o["on" + t] = null;
    }
};
/*compatible in IE6+,ff3.0,chrome,oprea*/
Js.floatElement = function(Id, Position) {   
    _bodyfrm = (document.compatMode.toLowerCase() == "css1compat") ? document.documentElement : document.body;
    _adst = document.getElementById(Id).style;_adst.position = "absolute"; _intWidth = _adst.width.replace("px", ""); _intHeight = _adst.height.replace("px", "");
    _move(Position);window.onscroll = window.onresize = function() {_move(Position);};
    function _move(Position) {
        switch (Position) {
            case "rightbottom": _adst.left = (_bodyfrm.scrollLeft + _bodyfrm.clientWidth - _intWidth) + "px";_adst.top = (_bodyfrm.clientHeight + _bodyfrm.scrollTop - _intHeight) + "px";break;
            case "leftbottom": _adst.left = "0px";_adst.top = (_bodyfrm.clientHeight + _bodyfrm.scrollTop - _intHeight) + "px";break;
            case "righttop": _adst.left = (_bodyfrm.scrollLeft + _bodyfrm.clientWidth - _intWidth) + "px";_adst.top = _bodyfrm.scrollTop + "px"; break;
            case "lefttop": _adst.left = "0px";  _adst.top = _bodyfrm.scrollTop + "px"; break;
        };
    };
};
Js.Guid = function() {
    var guid = "";
    for (var i = 1; i <= 32; i++) {
        var n = Math.floor(Math.random() * 16.0).toString(16);
        guid += n;
        if ((i == 8) || (i == 12) || (i == 16) || (i == 20))
            guid += "-";
    }
    return guid;
};
Js.SuggestStr = function(len, IsAC) {
    //include additional characters
    var AC = 'abcdefhijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWYXZ~!@$^*+-|/'; 
    var noAC = 'abcdefhijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWYXZ'; 
    function returnStr(list, len) {
       var re = '';
        for (i = 0; i < len; i++) {
            re += list.charAt(Math.floor(Math.random() * list.length))
        }
        return re;
    }
    return IsAC ? returnStr(AC, len) : returnStr(noAC, len);
};
Js.Str2XML = function(str) {
    if (window.ActiveXObject) {
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.loadXML(str);
        return xmlDoc;
    } else {
        parser = new DOMParser();
        xmlDoc = parser.parseFromString(str, "text/xml");
        return xmlDoc;
    }
};
Js.XML2Str = function(xmlObject) {
    if (window.ActiveXObject) {
        return xmlObject.xml;
    } else {
        return (new XMLSerializer()).serializeToString(xmlObject);
    }
};
Js.Str2Json = function(str) {
   return eval('(' + str + ')');
}
Js.ErrorHandler = function(msg, url, l) {
    //if (Js.IsDebug) {
    //    // for debug
    //    var txt = "";
    //    txt = "本页中存在错误。\n\n"
    //    txt += "错误：" + msg + "\n"
    //    txt += "URL: " + url + "\n"
    //    txt += "行：" + l + "\n\n"
    //    txt += "点击“确定”继续。\n\n"
    //    alert(txt);
    //}
    return false;
    // false , page response errors directly
    // true , var script above to handle errors
    // or you can save errors to server (to create logs file)
};

Js.Url = {
    encode: function(string) {
        return escape(this._utf8_encode(string));
    },
    decode: function(string) {
        return this._utf8_decode(unescape(string));
    },
    request:function(string)
    {
        var url = location.href; var paraObj = {}; var paraString = url.substring(url.indexOf("?") + 1, url.length).split("&");        
        for (i = 0; j = paraString[i]; i++) { paraObj[j.substring(0, j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=") + 1, j.length);}
        var returnValue = paraObj[string.toLowerCase()];
        if (typeof (returnValue) == "undefined") { return ""; } else { return returnValue; }
    },
    // private method
    _utf8_encode: function(string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";
        for (var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }
        }
        return utftext;
    },
    _utf8_decode: function(utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;
        while (i < utftext.length) {
            c = utftext.charCodeAt(i);
            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }
        }
        return string;
    }
}