/////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  ALTTXT V1.2
//  BY: BRIAN GOSSELIN OF SCRIPTASYLUM.COM
//  ADDED FADING EFFECT FOR IE4+ AND NS6+ ONLY AND OPTIMIZED THE CODE A BIT.
//  SCRIPT FEATURED ON DYNAMIC DRIVE (http://www.dynamicdrive.com)
//  Modifed by DD for doctype bug on Nov 13th, 2003


var dofade = false;     // ENABLES FADE-IN EFFECT FOR IE4+ AND NS6 ONLY
var center = false;     // CENTERS THE BOX UNER THE MOUSE, OTHERWISE DISPLAYS BOX TO THE RIGHT OF THE MOUSE
var centertext = false; // CENTERS THE TEXT INSIDE THE BOX. YOU CAN'T SIMPLY DO THIS VIA STYLE BECAUSE OF NS4.
// OTHERWISE, TEXT IS LEFT-JUSTIFIED.


////////////////////////////// NO NEED TO EDIT BEYOND THIS POINT //////////////////////////////////////

function ietruebody()
{
    return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
}

var NS4 = (navigator.appName.indexOf("Netscape") >= 0 && !document.getElementById) ? true : false;
var IE4 = (document.all && !document.getElementById) ? true : false;
var IE5 = (document.getElementById && document.all) ? true : false;
var NS6 = (document.getElementById && navigator.appName.indexOf("Netscape") >= 0 ) ? true : false;
var W3C = (document.getElementById) ? true : false;
var w_y, w_x, navtxt, boxheight, boxwidth;
var ishover = false;
var isloaded = false;
var ieop = 0;
var op_id = 0;

function getwindowdims()
{
    w_y = (NS4 || NS6 || window.opera) ? window.innerHeight : (IE5 || IE4) ? document.body.clientHeight : 0;
    w_x = (NS4 || NS6 || window.opera) ? window.innerWidth : (IE5 || IE4) ? document.body.clientWidth : 0;
}

function getboxwidth()
{
    if (NS4)boxwidth = (navtxt.document.width) ? navtxt.document.width : navtxt.clip.width;
    if (IE5 || IE4)boxwidth = (navtxt.style.pixelWidth) ? navtxt.style.pixelWidth : navtxt.offsetWidth;
    if (NS6)boxwidth = (navtxt.style.width) ? parseInt(navtxt.style.width) : parseInt(navtxt.offsetWidth);
}

function getboxheight()
{
    if (NS4)boxheight = (navtxt.document.height) ? navtxt.document.height : navtxt.clip.height;
    if (IE4 || IE5)boxheight = (navtxt.style.pixelHeight) ? navtxt.style.pixelHeight : navtxt.offsetHeight;
    if (NS6)boxheight = parseInt(navtxt.offsetHeight);

}

function movenavtxt(x, y)
{
    if (NS4)navtxt.moveTo(x, y);
    if (W3C || IE4)
    {
        navtxt.style.left = x + 'px';
        navtxt.style.top = y + 'px';
    }
}

function getpagescrolly()
{
    if (NS4 || NS6)return window.pageYOffset;
    if (IE5 || IE4)return ietruebody().scrollTop;
}

function getpagescrollx()
{
    if (NS4 || NS6)return window.pageXOffset;
    if (IE5 || IE4)return ietruebody().scrollLeft;
}

function writeindiv(text)
{
    if (NS4)
    {
        navtxt.document.open();
        navtxt.document.write(text);
        navtxt.document.close();
    }
    if (W3C || IE4)navtxt.innerHTML = text;
}

//**** END UTILITY FUNCTIONS ****//

function writetxt(text, x, y)
{
    if (isloaded)
    {
        if (text != 0)
        {
            ishover = true;
            if (NS4)text = '<div class="navtext">' + ((centertext) ? '<center>' : '') + text + ((centertext) ? '</center>' : '') + '</div>';
            writeindiv(text);
            getboxheight();
            if (NS4)navtxt.visibility = "show";
            if (W3C || IE4)navtxt.style.visibility = "visible";
            movenavtxt(x, y)
            if ((W3C || IE4) && dofade)
            {
                ieop = 0;
                incropacity();
            }
        }
        else
        {
            if (NS4)navtxt.visibility = "hide";
            if (IE4 || W3C)
            {
                if (dofade)clearTimeout(op_id);
                navtxt.style.visibility = "hidden";
            }
            writeindiv('');
            ishover = false;
        }
    }
}

function incropacity()
{
    if (ieop <= 100)
    {
        ieop += 7;
        if (IE4 || IE5)navtxt.style.filter = "alpha(opacity=" + ieop + ")";
        if (NS6)navtxt.style.MozOpacity = ieop / 100;
        op_id = setTimeout('incropacity()', 50);
    }
}

function moveobj(evt)
{
    if (isloaded && ishover)
    {
        margin = (IE4 || IE5) ? 1 : 23;
        if (NS6)if (document.height + 27 - window.innerHeight < 0)margin = 15;
        if (NS4)if (document.height - window.innerHeight < 0)margin = 10;
//mx=(NS4||NS6)? evt.pageX : (IE5||IE4)? event.clientX : 0;
        //my=(NS4||NS6)? evt.pageY : (IE5||IE4)? event.clientY : 0;
        if (NS4)
        {
            mx = evt.pageX
            my = evt.pageY
        }
        else if (NS6)
        {
            mx = evt.clientX
            my = evt.clientY
        }
        else if (IE5)
        {
            mx = event.clientX
            my = event.clientY
        }
        else if (IE4)
        {
            mx = 0
            my = 0
        }

        if (NS4)
        {
            mx -= getpagescrollx();
            my -= getpagescrolly();
        }
        xoff = (center) ? mx - boxwidth / 2 : mx + 5;
        yoff = (my + boxheight + 30 - getpagescrolly() + margin >= w_y) ? -15 - boxheight : 30;
        //movenavtxt(Math.min(w_x - boxwidth - margin, Math.max(2, xoff)) + getpagescrollx(), my + yoff + getpagescrolly());
        if (NS4)navtxt.visibility = "show";
        if (W3C || IE4)navtxt.style.visibility = "visible";
    }
}

//if (NS4)document.captureEvents(Event.MOUSEMOVE);
//document.onmousemove = moveobj;
window.onload = function()
{
    navtxt = (NS4) ? document.layers['navtxt'] : (IE4) ? document.all['navtxt'] : (W3C) ? document.getElementById('navtxt') : null;
    getboxwidth();
    getboxheight();
    getwindowdims();
    isloaded = true;
    if ((W3C || IE4) && centertext)navtxt.style.textAlign = "center";
    if (W3C)navtxt.style.padding = '4px';
    if (IE4 || IE5 && dofade)navtxt.style.filter = "alpha(opacity=0)";
}
window.onresize = getwindowdims;