// Common Use Methodes
//********************************************
//this function recursevly retrive a parent object 
//and calculate an absolute position of given object
function getParentObjTop(obj) {
    var yPos = 0;
    while (obj != null) {
        yPos += obj.offsetTop
        obj = obj.offsetParent;
    }
    return yPos;
}
//this function recursevly retrive a parent object 
//and calculate an absolute position of given object
function getParentObjLeft(obj) {
    var xPos = 0;
    while (obj != null) {
        xPos += obj.offsetLeft
        obj = obj.offsetParent;
    }
    return xPos;
}

//Get object by id
function $(id) {
    if (typeof id == 'string')
        return document.getElementById(id);
    else
        return id;
}
//get object by id
function $N(name) {
    if (typeof name == 'string')
        return document.getElementsByTagName(name);
    else
        return null;
}
//return false if id is not an object
function $Null(el) {
    return (el == undefined || el == null);
}


//Get a Browser ViewPort height
function $vpHeight() {
    return window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
}

//get offset Left position
function $X(name) {
    var el = $(name);
    if (el) {
        var off = el.offsetLeft;
        var pObj = el.offsetParent;
        if (pObj) off += $X(pObj);
        return off;
    }
    else return 0;
}
//get offset Top position
function $Y(name) {
    var el = $(name);
    if (el) {
        var off = el.offsetTop;
        var pObj = el.offsetParent;
        if (pObj) off += $Y(pObj);
        return off;
    }
    else return 0;
}
//get object's width
function $W(name) {
    var el = $(name);
    if (el) {
        //el.style.width=el.offsetWidth;
        return el.clientWidth;
    }
    else return 0;
}
//get object's height
function $H(name) {
    var el = $(name);
    if (el) {
        //el.style.height=el.offsetHeight;
        return el.clientHeight;
    }
    else return 0;
}
//attaches events and functions
function $AddEvt(obj, evt, func) {
    if (document.addEventListener)
        obj.addEventListener(evt, func, false);
    else if (document.attachEvent)
        obj.attachEvent("on" + evt, func);
    else
        eval(obj + ".on" + evt + "=" + func);
}
function $Cancel(e) {
    if (window.event) {
        window.event.cancelBubble = true;
        window.event.returnValue = false;
    }
    if (e && e.preventDefault && e.stopPropagation) {
        e.preventDefault();
        e.stopPropagation();
    }
}
function $ScrollTop() {
    if (document.body && document.body.scrollTop)
        return document.body.scrollTop;
    if (document.documentElement && document.documentElement.scrollTop)
        return document.documentElement.scrollTop;
    if (window.pageYOffset)
        return window.pageYOffset;
    return 0;
}
//get query string param
function $QGet(el, q) {
    var val = "";
    if (typeof (q) == "undefined") q = document.location.search;

    var qArr = q.split(el + "=");
    if (qArr.length > 1) {
        val = qArr[1];
        if (val.indexOf("&") > -1) val = val.slice(0, val.indexOf("&"));
    }
    return val;
}
function $QSet(el, val, q) {
    if (el != "") {
        if (typeof (q) != "string") q = document.location.search;

        q = q.replace("?", "");

        if (q.indexOf(el + "=") == -1) {
            if (q.length > 0) q += "&";
            q += el + "=" + val;
        }
        else {
            var left = "", right = "";

            left = q.substr(0, q.indexOf(el + "=") - 1);

            right = q.substr(q.indexOf(el + "="));
            right = (right.indexOf("&") == -1) ? "" : right.substr(right.indexOf("&"));

            q = left;
            if (q.length > 0) q += "&";
            q += el + "=" + val;
            q += right;
        }
        //if(q.indexOf("?")==-1) q = q.replace(/&/,"?");
    }
    return q;
}
//set or get cookie
function $Cookie(n, v, d) {
    if (n && v) {//set cookie
        var expires;
        if (d) {
            var date = new Date();
            date.setTime(date.getTime() + (d * 24 * 60 * 60 * 1000));
            expires = "; expires=" + date.toGMTString();
        }
        else expires = "";
        document.cookie = n + "=" + v + expires + "; path=/";
    }
    else if (n) {//get cookie
        n = n + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1, c.length);
            if (c.indexOf(n) == 0)
                return c.substring(n.length, c.length);
        }
    }
    return null;
}
function $Hide(obj) {
    obj = $(obj);
    if (obj) obj.style.display = "none";
}
function $Show(obj) {
    obj = $(obj);
    if (obj) obj.style.display = "block";
}
function $CallBackError(arg, context) {
    alert('An unexpected error has occurred.');
}
function $Sort(col) {
    document.location = $QSet("sort", col);
}
function $Pg(num, context) {
    document.location = $QSet("pg", num);
}
function $Submit() { }
//********************************************
function $isIE() {
    return (document.all) ? true : false;
}
// return an elment css property value
function getStyle(el, styleProp) {
    var x = null;
    if (typeof (el) == "string")
        x = document.getElementById(el);
    else
        x = el;

    var y = 0;
    if (x.currentStyle)
        y = x.currentStyle[styleProp];
    else if (window.getComputedStyle)
        y = document.defaultView.getComputedStyle(x, null).getPropertyValue(styleProp);

    return y;

}

function trim(stringToTrim) {
    return stringToTrim.replace(/^\s+|\s+$/g, "");
}
function ltrim(stringToTrim) {
    return stringToTrim.replace(/^\s+/, "");
}
function rtrim(stringToTrim) {
    return stringToTrim.replace(/\s+$/, "");
}