/*********************************************************************************************

ALTTXT V1.4


NOTE: YOU CAN CAUSE A BOX *NOT* TO DISAPPEAR ONCE THE MOUSE LEAVES THE LINK BY SIMPLY OMITTING
THE onmouseout="writetxt(0)" PART. THIS WILL CAUSE THE CURRENT BOX TO REMAIN VISIBLE. THIS
IS BEST USED WHEN mousefollow MODE IS DISABLED (SET TO false).

*********************************************************************************************/

var mousefollow = true;  // ENABLES MOUSE FOLLOW MODE WHERE THE BOX CONTINUES TO FOLLOW THE MOUSE.
// SETTING TO false WILL CAUSE THE BOX TO APPEAR NEAR THE MOUSE BUT WILL NOT
// CONTINUE TO FOLLOW THE MOUSE. 
var dofade = true;       // ENABLES FADE-IN EFFECT (FOR IE4+ AND NS6 ONLY)
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.
var xoffset = 5;         // HORIZONTAL PIXEL COUNT FROM CURSOR
var yoffset = 5;         // VERTICAL PIXEL COUNT FROM CURSOR

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

function altProps() {

    this.ns4 = (navigator.appName.indexOf("Netscape") >= 0 && !document.getElementById) ? true : false;
    this.ie4 = (document.all && !document.getElementById) ? true : false;
    this.ie5 = (document.getElementById && document.all) ? true : false;
    this.ns6 = (document.getElementById && navigator.appName.indexOf("Netscape") >= 0) ? true : false;
    this.w3c = (document.getElementById) ? true : false;
    this.w_y = 0;
    this.w_x = 0;
    this.navtxt = 0;
    this.boxheight = 0;
    this.boxwidth = 0;
    this.ishover = false;
    this.isloaded = true;
    this.ieop = 0;
    this.op_id = 0;
    this.oktomove = false;
}

var AT = new altProps();

function getwindowdims() {
    AT.w_y = (AT.ie5 || AT.ie4) ? document.body.clientHeight : window.innerHeight;
    AT.w_x = (AT.ie5 || AT.ie4) ? document.body.clientWidth : window.innerWidth;
}

function getboxwidth() {
    if (AT.ns4) AT.boxwidth = (AT.navtxt.document.width) ? AT.navtxt.document.width : AT.navtxt.clip.width;
    else if (AT.ie4) AT.boxwidth = (AT.navtxt.style.pixelWidth) ? AT.navtxt.style.pixelWidth : AT.navtxt.offsetWidth;
    else AT.boxwidth = (AT.navtxt.style.width) ? parseInt(AT.navtxt.style.width) : parseInt(AT.navtxt.offsetWidth);
}

function getboxheight() {
    if (AT.ns4) AT.boxheight = (AT.navtxt.document.height) ? AT.navtxt.document.height : AT.navtxt.clip.height;
    else if (AT.ie4) AT.boxheight = (AT.navtxt.style.pixelHeight) ? AT.navtxt.style.pixelHeight : AT.navtxt.offsetHeight;
    else AT.boxheight = parseInt(AT.navtxt.offsetHeight);
}

function movenavtxt(x, y) {
    if (AT.ns4) AT.navtxt.moveTo(x, y);
    else {
        AT.navtxt.style.left = x + 'px';
        AT.navtxt.style.top = y + 'px';
    }
}

function getpagescrolly() {
    if (AT.ie5 || AT.ie4) return document.body.scrollTop;
    else return window.pageYOffset;
}

function getpagescrollx() {
    if (AT.ie5 || AT.ie4) return document.body.scrollLeft;
    else return window.pageXOffset;
}

function writeindiv(text) {

    if (AT.ns4) {
        AT.navtxt.document.open();
        AT.navtxt.document.write(text);
        AT.navtxt.document.close();
    }
    else AT.navtxt.innerHTML = text;
}

function writetxt(text) {
    
    if (AT.isloaded ) { 
        if (text != 0) {
            AT.oktomove = true;
            AT.ishover = true;
            if (AT.ns4) text = '<div class="navtext">' + ((centertext) ? '<center>' : '') + text + ((centertext) ? '</center>' : '') + '</div>';
            writeindiv(text);
            if (AT.ns4) AT.navtxt.visibility = "show";
            else {
                AT.navtxt.style.visibility = "visible";
                AT.navtxt.style.display = "block";
            }
            getboxheight();
            if ((AT.w3c || AT.ie4) && dofade) {
                if (AT.ie4 || AT.ie5) AT.navtxt.style.filter = "alpha(opacity=0)";
                if (AT.ns6) AT.navtxt.style.MozOpacity = 0;
                AT.ieop = 0;
                AT.op_id = setInterval('incropacity()', 50);
            }
        } else {
            if (AT.ns4) AT.navtxt.visibility = "hide";
            else {
                if (dofade) clearInterval(AT.op_id);
                AT.navtxt.style.display = "none";
                AT.navtxt.style.visibility = "hidden";
            }
            writeindiv('');
            //AT.ishover=false;
        }
    }
}

function incropacity() {
    if (AT.ieop <= 100) {
        AT.ieop += 7;
        if (AT.ie4 || AT.ie5) AT.navtxt.style.filter = "alpha(opacity=" + AT.ieop + ")";
        if (AT.ns6) AT.navtxt.style.MozOpacity = AT.ieop / 100;
    } else clearInterval(AT.op_id);
}

function moveobj(evt) {
    if (AT.isloaded && AT.ishover && AT.oktomove) {
        margin = (AT.ie4 || AT.ie5) ? 5 : 25;
        if (AT.ns6) if (document.height + 27 - window.innerHeight < 0) margin = 15;
        if (AT.ns4) if (document.height - window.innerHeight < 0) margin = 10;
        mx = (AT.ie5 || AT.ie4) ? event.clientX : evt.pageX;
        my = (AT.ie5 || AT.ie4) ? event.clientY : evt.pageY;
        if (AT.ns4 || AT.ns6) mx -= getpagescrollx();
        if (AT.ns4) my -= getpagescrolly();
        xoff = mx + xoffset;
        yoff = (my + AT.boxheight + 25 - ((AT.ns6) ? getpagescrolly() : 0) + margin >= AT.w_y) ? -15 - AT.boxheight : 30;
        movenavtxt(Math.min(AT.w_x - AT.boxwidth - margin, Math.max(2, xoff)) + getpagescrollx(), my + yoff + ((!AT.ns6) ? getpagescrolly() : 0));
        if (!mousefollow) AT.oktomove = false;
    }
}

function winonload() {
    AT.navtxt = (AT.ns4) ? document.layers['navtxt'] : (AT.ie4) ? document.all['navtxt'] : (AT.w3c) ? document.getElementById('navtxt') : null;
    getboxwidth();
    getboxheight();
    getwindowdims();
    AT.isloaded = true;
    if ((AT.w3c || AT.ie4) && centertext) AT.navtxt.style.textAlign = "center";
    if (AT.w3c) AT.navtxt.style.padding = '4px';
    if (AT.ie4 || AT.ie5 && dofade) AT.navtxt.style.filter = "alpha(opacity=0)";
}

if (AT.ns4) document.captureEvents(Event.MOUSEMOVE);

document.onmousemove = moveobj;

window.onload=function(){
  AT.navtxt=(AT.ns4)? document.layers['navtxt'] : (AT.ie4)? document.all['navtxt'] : (AT.w3c)? document.getElementById('navtxt') : null; 
  getboxwidth();
  getboxheight();
  getwindowdims();
  AT.isloaded=true;
  if((AT.w3c || AT.ie4) && centertext)AT.navtxt.style.textAlign="center";
  if(AT.w3c)AT.navtxt.style.padding='4px';
  if(AT.ie4 || AT.ie5 && dofade)AT.navtxt.style.filter="alpha(opacity=0)";
  }

window.onresize = getwindowdims;