// Browser Variables
var loaded = "false";
var ie = document.all && navigator.userAgent.indexOf("Opera") == -1;
var ns = document.getElementById && !document.all;
var mac = navigator.userAgent.indexOf("Mac") > -1;
var ns6 = navigator.userAgent.indexOf("Netscape6") > -1;
var saf = navigator.userAgent.indexOf("Safari") > -1;
var iemac = mac && ie;

// Script Variables
menushown = 0;
linktype = 0;
clickedlink = 0;
hideme = 1;
var studentname = "none";
var imgnum = "";
var menulocstring="";
var menulocstring2="";

// Main function to show menu
// imgid=The id used to uniquely identify this link usually an id placed on the link or an image where the menu will anchor
// menuid=The id of the menu that will be popped open
// depth=how many levels down the table hierarchy this link sits ie. a table embedded in a table would be 2
// linktype=identifies several different link types that affect how the menu is positioned
//   1- where menu needs to be pushed to the far left of the page and only positioned vertically
//   2- where menu needs to be postioned at top of page in a different frame
//   3- where menu needs to be positioned at top of page
//   4- when link is an action with an icon image inside button and menu should line up with the button
//   5- when link is an action button and menu should line up with the button
// frameid=used only when the menu will appear in a different frame
function showmenu(imgid, menuid, depth, linktypevar, frameid) {
    linktype = linktypevar;
    menunum = menuid;
    imgnum = imgid;

    // FORCE MENUS WIDE FOR MAC BUG
    if (iemac) {
        document.styleSheets[0].rules[0].style.width=220 + "px";
        document.styleSheets[0].rules[1].style.width=220 + "px";
        document.styleSheets[0].rules[2].style.width=220 + "px";
        document.styleSheets[0].rules[3].style.width=220 + "px";
    }

    // HIDE ANY MENU SHOWING PREVIOUSLY
    hidemenu();

    // SET THE MAIN MENU VARIABLE
    if (frameid)
        themenu = parent.frames[frameid].document.getElementById(menuid);
    else
        themenu = document.getElementById(menuid);

    // FIND THE LINK TO KEY THE LOCATION OFF OF
    thelink = document.getElementById(imgid + "img");

    // GET INITIAL LOCATION OF LINK
    x = thelink.offsetLeft;
    y = thelink.offsetTop;
    papa = thelink.offsetParent;
    x += papa.offsetLeft;
    y += papa.offsetTop;
   
    // GET THE PARENT TABLE FOR POSITIONING, OR IF IT'S IN A SUB-TABLE (DEPTH > 0) GET THE PARENT OF THE PARENT TABLE
    if (depth > 0) {
        thetable = thelink.parentNode;
        cycle = 0
        for (i = 0; i <= 10; i++) {
            if (thetable.nodeName != "TABLE") {
                thetable = thetable.parentNode;
            }
            else
                break;
        }

        if (depth <= 1) {
            if ((ie && !mac) || (mac && linktype != 4)) {
                x = x + thetable.offsetLeft;
                y = y + thetable.offsetTop;
            } else if (ns && !ns6) {
                x = x + thetable.offsetLeft;
                y = y + thetable.offsetTop;
            } else {
                y = y + 20;
                x = x + 15;
            }
        }
    }

    if (depth > 1) {
        thetable2 = thetable.parentNode;
        cycle = 0;
        for (i = 0; i <= 10; i++) {
            if (thetable2.nodeName != "TABLE") {
                thetable2 = thetable2.parentNode;
            }
            else
                break;
        }
        if ((ie && !mac) || (mac && linktype != 4)) {
            x = x + thetable2.offsetLeft;
            y = y + thetable2.offsetTop;
        } else if (ns && !ns6) {
            x = x + thetable2.offsetLeft;
            y = y + thetable2.offsetTop;
        } else {
            y = y + 20;
            x = x + 15;
        }
    }

    if (depth > 1 && !iemac) {
        papa2 = papa.offsetParent;
        x += papa2.offsetLeft;
        y += papa2.offsetTop;
    }
    if (depth > 1 && !iemac) {
        papa3 = papa2.offsetParent;
        x += papa3.offsetLeft;
        y += papa3.offsetTop;
    }
    if (depth > 2 && !iemac) {
        papa4 = papa3.offsetParent;
        papa5 = papa4.offsetParent;
        x += papa5.offsetLeft;
        //y += papa4.offsetTop;
    }

    // MAKE SOME MINOR ADJUSTMENT TO POSITION
    y = ie && !mac ? y + 16 : ns && !ns6 ? y + 20 : y - 6;
    x = ie ? x : ns && !ns6 ? x + 0 : x + 0;

    // CHECK FOR PUSH LEFT VARIABLE THAT ALWAYS KEEP THE MENUS TO THE LEFT OF THE SCREEN
    if (linktype == 1) {
        x = 25;
    }
    if (linktype == 2) {
        x -= 10;
        y = 0 + parent.frames['PGCRF'].document.body.scrollTop;
    }
    if (linktype == 3) {
        y = 0;
    }
    if (linktype == 4) {
        y = ie ? y + 8 : y;
        x = saf ? x + 10 : x;
    }
    if (linktype == 5) {
        y = ie ? y + 2 : y;
    }
    if (linktype == 6) {
        x -= 5;
        y += 15;
    }

    // SET POSTION ADJUST TO MAKE SURE IT DOESN'T GO OFF SCREEN TO THE RIGHT
    themenu.stl = ns6 ? themenu : themenu.style;
    thelink.contentwidth = thelink.offsetWidth;
    themenu.contentwidth = themenu.offsetWidth;
    themenu.contentheight = themenu.offsetHeight;
    var rightedge = ie ? document.body.clientWidth - x : window.innerWidth - x
    var bottomedge = ie ? document.body.clientHeight - y : window.innerHeight - y

    if (rightedge < themenu.contentwidth && linktype != 2) {
     x-=themenu.contentwidth-thelink.contentwidth;
    }
    if (x < 0) {
        x = 0;
    }
    themenu.stl.left = x + "px";

    if (bottomedge < themenu.contentheight && linktype == 1) {
        y = y - themenu.contentheight - 10;
    }
    if (y < 0) {
        y = 0;
    }
    themenu.stl.top = y + "px";

    if(document.getElementById('DivShim')&&ie) {
        theiframe = document.getElementById('DivShim');
        theiframe.style.width = themenu.offsetWidth;
        theiframe.style.height = themenu.offsetHeight;
        theiframe.style.top = themenu.stl.top;
        theiframe.style.left = themenu.stl.left;
        theiframe.style.zIndex = 9;
        theiframe.style.display = "block";
    }

    // MAKE MENU VISIBLE
    themenu.stl.visibility = "visible";
    menushown = 1;
   menulocstring2=menulocstring;
    if (linktype != 2 && linktype != 4) {
        menulocstring = '#' + menuid + "links";
      if(!saf || menulocstring2!=menulocstring)
        document.location = menulocstring;
    }
}

function hidemenu() {
    if (menushown == 1 && hideme == 1) {
        if (linktype != 2 && linktype != 3 && linktype != 4) {
            locstring = '#' + imgnum + 'link'
            if(!saf || menulocstring2!=menulocstring)document.location = locstring;
        }
        themenu.stl.visibility = "hidden";
    if(document.getElementById('DivShim')&&ie) {
        theiframe = document.getElementById('DivShim');
        theiframe.style.display = "none";}
        menushown = 0;
    }
    hideme = 1;
}

function nextlink() {
   locstring = '#' + imgnum + 'link'
    if(!saf)document.location = locstring;
}