function launchCenter(url, name, height, width, extra) {
            var str = "height=" + height + ",innerHeight=" + height;
            str += ",width=" + width + ",innerWidth=" + width;
            if (window.screen) {
                var ah = screen.availHeight - 30;
                var aw = screen.availWidth - 10;

                var xc = (aw - width) / 2;
                var yc = (ah - height) / 2;

                str += ",left=" + xc + ",screenX=" + xc;
                str += ",top=" + yc + ",screenY=" + yc;
                str += extra;
            }
            return window.open(url, name, str);
        }

        function search() {
            if (document.aspnetForm.txtAra.value.length == 0) {
                alert("Arama kutusu boş geçilemez");
            }
            else {
                location.href = '/ara.aspx?str=' + document.aspnetForm.txtAra.value;
            }

        }

        function preloader() {
            img1 = new Image(); img1.src = "/img/kutu_menu_aktif.jpg";
            img2 = new Image(); img2.src = "/img/kutu_menu_pasif.jpg";
            img3 = new Image(); img3.src = "/img/kutu_menu_sub_aktif.jpg";
            img4 = new Image(); img4.src = "/img/kutu_menu_sub_pasif.jpg";
        }




        var defaultMenuWidth = "150px" //set default menu width.

        var linkset = new Array()
        //SPECIFY MENU SETS AND THEIR LINKS. FOLLOW SYNTAX LAID OUT

        linkset[0] = '<a href="/uye-ol.aspx">Derneğe Üye Ol</a>'
        linkset[0] += '<a href="/uye-sifremi-unuttum.aspx">Giriş Şifremi Unuttum</a>'
        linkset[0] += '<a href="/uye-aktivasyon.aspx">Aktivasyon Kodu Gönder</a>'
        ////No need to edit beyond here

        var ie5 = document.all && !window.opera
        var ns6 = document.getElementById

        if (ie5 || ns6)
            document.write('<div id="popitmenu" onMouseover="clearhidemenu();" onMouseout="dynamichide(event)"></div>')

        function iecompattest() {
            return (document.compatMode && document.compatMode.indexOf("CSS") != -1) ? document.documentElement : document.body
        }

        function showmenu(e, which, optWidth) {
            if (!document.all && !document.getElementById)
                return
            clearhidemenu()
            menuobj = ie5 ? document.all.popitmenu : document.getElementById("popitmenu")
            menuobj.innerHTML = which
            menuobj.style.width = (typeof optWidth != "undefined") ? optWidth : defaultMenuWidth
            menuobj.contentwidth = menuobj.offsetWidth
            menuobj.contentheight = menuobj.offsetHeight
            eventX = ie5 ? event.clientX : e.clientX
            eventY = ie5 ? event.clientY : e.clientY
            //Find out how close the mouse is to the corner of the window
            var rightedge = ie5 ? iecompattest().clientWidth - eventX : window.innerWidth - eventX
            var bottomedge = ie5 ? iecompattest().clientHeight - eventY : window.innerHeight - eventY
            //if the horizontal distance isn't enough to accomodate the width of the context menu
            if (rightedge < menuobj.contentwidth)
            //move the horizontal position of the menu to the left by it's width
                menuobj.style.left = ie5 ? iecompattest().scrollLeft + eventX - menuobj.contentwidth + "px" : window.pageXOffset + eventX - menuobj.contentwidth + "px"
            else
            //position the horizontal position of the menu where the mouse was clicked
                menuobj.style.left = ie5 ? iecompattest().scrollLeft + eventX + "px" : window.pageXOffset + eventX + "px"
            //same concept with the vertical position
            if (bottomedge < menuobj.contentheight)
                menuobj.style.top = ie5 ? iecompattest().scrollTop + eventY - menuobj.contentheight + "px" : window.pageYOffset + eventY - menuobj.contentheight + "px"
            else
                menuobj.style.top = ie5 ? iecompattest().scrollTop + event.clientY + "px" : window.pageYOffset + eventY + "px"
            menuobj.style.visibility = "visible"
            return false
        }

        function contains_ns6(a, b) {
            //Determines if 1 element in contained in another- by Brainjar.com
            while (b.parentNode)
                if ((b = b.parentNode) == a)
                    return true;
            return false;
        }

        function hidemenu() {
            if (window.menuobj)
                menuobj.style.visibility = "hidden"
        }

        function dynamichide(e) {
            if (ie5 && !menuobj.contains(e.toElement))
                hidemenu()
            else if (ns6 && e.currentTarget != e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget))
                hidemenu()
        }

        function delayhidemenu() {
            delayhide = setTimeout("hidemenu()", 500)
        }

        function clearhidemenu() {
            if (window.delayhide)
                clearTimeout(delayhide)
        }

        if (ie5 || ns6)
            document.onclick = hidemenu