// special thanks to Richard Ishida.
// hacked out of http://people.w3.org/rishida/scripts/uniview/conversion.php
// basically, these functions take an ascii string and convert it to decimal
// notation. then we use the decimal notation to throw off spammers.
function dec2hex ( textString ) {
 return (textString+0).toString(16).toUpperCase();
}
function convertChar2CP ( textString ) { 
    var haut = 0;
    var n = 0;
    CPstring = '';
    for (var i = 0; i < textString.length; i++) {
        var b = textString.charCodeAt(i); 
        CPstring += dec2hex(b) + ' ';
    }
    CPstring = CPstring.substring(0, CPstring.length-1);
    return( CPstring );
}
function convertCP2DecNCR ( textString ) {
  textString = convertChar2CP( textString );
  var outputString = "";
  textString = textString.replace(/^\s+/, '');
  if (textString.length == 0) { return ""; }
  textString = textString.replace(/\s+/g, ' ');
  var listArray = textString.split(' ');
  for ( var i = 0; i < listArray.length; i++ ) {
    var n = parseInt(listArray[i], 16);
    outputString += ('&#' + n + ';');
  }
  return( outputString );
}
var noSpam = convertCP2DecNCR('mailto');
var name = convertCP2DecNCR('info');
var atSign = convertCP2DecNCR('@');
function writeAntiSpamEmail(domain, address){
    
    if (!address || address.length == 0)
        address = 'info';
    
    domain = convertCP2DecNCR(domain);
    var retVal = address + atSign + domain;
    
    document.write("<a href='" + noSpam + ":" + retVal +"'>" + retVal +"</a>");
}


/** 
* highlightNavItemIfCurrent(pageNames)
* 
* highlights left nav item corresponding to current page.
* all you have to do is pass it an array of pageNames.
*
* @author Nick Johnson
*/
function highlightNavItemIfCurrent(pageNames)
{
	for (var i=0; i<pageNames.length; i++)
	{
		if (url.lastIndexOf('/'+pageNames[i]+'.shtml') > -1)
	   	{
	   		if ( pageNames[i] == 'index') pageNames[i] = 'overview'; // index == overview
	   		activeNav = document.getElementById('leftbar_'+pageNames[i]); 
	   		activeNav.className = 'current';
	    }
	}
}

//swap image on mouseover and mouseout
//replicated from Hallies image_over.js
var outImageURL;
function swapImageMouseOver(imageObject, overImageURL)
{
    outImageURL = imageObject.src;
    imageObject.src = overImageURL;
}
function swapImageMouseOut(imageObject)
{
    imageObject.src = outImageURL;
}

/**
 * bgPositionSwap()
 * 
 * This function is used as a substitute for the swapImage functions above.
 * Those may be undesirable because you must load the image each time.  Instead, if
 * you create a background image with both link state and hover state on top of each other,
 * you can have the background position change and show the new image, without ever loading
 * it (since its already there, you just cant see it).
 *
 * To make it work properly, make an anchor (<a>) with class 'bgswap' and let it have the desired
 * default background image, with the exact height and width of one state of the background image.
 * Then call the following function with mouseover on the anchor element, supplying "this" as the
 * element argument, and the default position for the second argument, and the new position for the
 * last.  Depending on where your hover state is on the image itself, you may need to pass in negative
 * values for over_position.
 *
 * Example: 
 *      CSS: #learn_more_button { width: 147px; height: 33px; background: 0 0 url('/images/sitewide/button_learnmore_tall.gif') no-repeat; }
 *     HTML: <a id="learn_more_button" class="bgswap" href="/our_program/index.shtml" onmouseover="bgPositionSwap(this, '0 0', '0 -36px');"></a>
 *
 *
 * @author sadkinson
 */
function bgPositionSwap(element, out_position, over_position)
{
    element.style.backgroundPosition = over_position;
    element.onmouseout = function() {
        this.style.backgroundPosition = out_position;
    }
}


// makeWindow popup
var link     = "";
function makeWindow(window_title)
{
    var screen_width  = screen.width;
    var screen_height = screen.height;
    var window_width  = 475;
    var window_height = 462;
    var window_left   = (screen.width-window_width)/2;
    var window_top    = (screen.height-window_height)/2 - 25;
    var newWin = window.open('' + link + '',window_title,'resizable=yes,status=no,location=no,menubar=no | 0,scrollbars=no,toolbar=no,width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + '');
    newWin.focus();
}

function popup(url, title, width, height)
{
    var window_left = (screen.width - width)/2;
    var window_top  = (screen.height - height)/2 - 25;
    var newWindow = window.open(url, title, 'resizeable=no, status=no, location=no,menubar=no | 0,scrollbars=no,toolbar=no,width='+width+',height='+height+',top='+window_top+',left='+window_left);
    newWindow.focus();
}

//insert flash videos for the "Meet the Students" section
function insertStudentBroadbandFlash(url) { insertFlash(url, 320, 240, "FALSE"); }
function insertStudentDialupFlash(url)    { insertFlash(url, 192, 144, "FALSE"); }


//Insert Flash Movie
function insertFlash(movieURL, width, height, loop) {
    
    //use our flvplayer if it is an flv
    if (movieURL.substring(movieURL.length-5).lastIndexOf("flv") >= 0)
    {
        //add 15 to the height for the menu controls...
        height += 15;
       
        var warningHTML = '<div id="flashcontent" align="center">'
                            + '<p style="font-weight:bold;font-size:14pt;">You need to upgrade your Flash Player to at<br>least version 8 to view this video content.</p>'
                            + '<p><a href="http://www.adobe.com/flashplayer/">Click here to download the latest version of Flash Player</a>.</p>'
                         + '</div>'
        var so = new SWFObject("/lib/swf/flvplayer.swf?theFile="+movieURL+"&theVolume=100&startPlayingOnload=yes&popUpHelp=no&bufferSeconds=1&videoSmoothing=yes","flvplayer",width,height,"8","#000000");
        so.addParam("movie","/lib/swf/flvplayer.swf?theFile="+movieURL+"&theVolume=100&startPlayingOnload=yes&popUpHelp=no&bufferSeconds=1&videoSmoothing=yes");
        so.addParam("bgcolor","#000000");
        so.addParam("wmode","transparent");
    
    
        // embed the flash movie
        document.write(warningHTML);
        so.write("flashcontent");
    }
    
    else
    {
        var flashHTML = '<OBJECT CLASSID="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"'
            + 'WIDTH="'+width+'" HEIGHT="'+height+'" '
            + 'CODEBASE="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">'
            + '<PARAM NAME="MOVIE" VALUE="'+movieClip+'">'
            + '<PARAM NAME="PLAY" VALUE="true">'
            + '<PARAM NAME="LOOP" VALUE="'+loop+'">'
            + '<PARAM NAME="QUALITY" VALUE="high">'
            + '<EMBED SRC="'+movieURL+'"'
            + 'WIDTH="'+width+'" HEIGHT="'+height+'"'
            + 'PLAY="true"'
            + 'LOOP="'+loop+'"'
            + 'QUALITY="high"'
            + 'TYPE="application/x-shockwave-flash"'
            + 'PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash">'
            + '<\/EMBED>'
            + '<\/OBJECT>';
        
        // embed the flash movie
        document.write(flashHTML);
    }
}


//these functions handle the "username" and "password" background images on the homepage login thing
function handleLoginBackgroundOnFocus(element)
{
    element.style.backgroundPosition = "-9999px -9999px";
}
function handleLoginBackgroundOnBlur(element)
{
    if (element.value == 0)
        element.style.backgroundPosition = "0 2px";
    else
        element.style.backgroundPosition = "-9999px -9999px";
}

/**
 * add code to run when the page is done loading...
 * http://www.sitepoint.com/blogs/2004/05/26/closures-and-executing-javascript-on-page-load/
 
function addLoadEvent(func) { 
    var oldonload = window.onload;
    
    if (typeof window.onload != 'function')
        window.onload = func; 
    else
        window.onload = function() { 
            oldonload(); 
            func();
        }
}*/


/**
 * Set a coookie.  Code from www.w3schools.com
 */
function setCookie(c_name,value,expiredays)
{
    var exdate = new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie = c_name+ "=" +escape(value)+
       ((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
}

/**
 * Get the value of a cookie.  Code from www.w3schools.com
 */
function getCookie(c_name)
{
    if (document.cookie.length > 0)
    {
        c_start=document.cookie.indexOf(c_name + "=");
        if (c_start != -1)
        { 
            c_start = c_start + c_name.length+1;
            c_end = document.cookie.indexOf(";",c_start);
            if (c_end == -1)
                c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start,c_end));
        } 
    }
    return "";
}






/*****************************************************
 * ypSlideOutMenu
 * 3/04/2001
 *
 * a nice little script to create exclusive, slide-out
 * menus for ns4, ns6, mozilla, opera, ie4, ie5 on
 * mac and win32. I've got no linux or unix to test on but
 * it should(?) work...
 *
 * --youngpup--
 *
 *
 * UPDATE: This has worked on all common browsers on
 * all platforms.  I have modified the code some since
 * the date above, but only minor placement issues, etc.
 * 
 * --sadkinson (8/7/07)
 *****************************************************/

ypSlideOutMenu.Registry = [];
ypSlideOutMenu.aniLen = 300;
ypSlideOutMenu.hideDelay = 100;
ypSlideOutMenu.minCPUResolution = 10;

// constructor
function ypSlideOutMenu(id, dir, left, top, width, num_elements)
{
    this.ie  = (document.all ? 1 : 0);
    this.ns4 = (document.layers ? 1 : 0);
    this.dom = (document.getElementById ? 1 : 0);

    if (this.ie || this.ns4 || this.dom)
    {
        //interpret the height
        height = num_elements * heightOfEachElement + topBorderHeight + bufferSpace;
        
        this.id          = id;
        this.dir         = dir;
        this.orientation = (dir == "left" || dir == "right" ? "h" : "v");
        this.dirType     = (dir == "right" || dir == "down" ? "-" : "+");
        this.dim         = (this.orientation == "h" ? width : height);
        this.hideTimer   = false;
        this.aniTimer    = false;
        this.open        = false;
        this.over        = false;
        this.startTime   = 0;
        this.aniLen      = ypSlideOutMenu.aniLen *(num_elements/5);

        // global reference to this object
        this.gRef = "ypSlideOutMenu_"+id;
        eval(this.gRef+"=this");

        // add this menu object to an internal list of all menus
        ypSlideOutMenu.Registry[id] = this;

        var d = document;

        var strCSS = '<style type="text/css">';
        strCSS += '#' + this.id + 'Container { visibility:hidden; ';
        strCSS += 'left:' + left + 'px; ';
        strCSS += 'top:' + top + 'px; ';
        strCSS += 'overflow:hidden; z-index:10000; }';
        strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { text-align: left; position:absolute; ';
        strCSS += 'width:' + width + 'px; ';
        strCSS += 'height:' + height + 'px; ';
        strCSS += 'clip:rect(0 ' + width + ' ' + height + ' 0); ';
        strCSS += '}';
        strCSS += '</style>';

        d.write(strCSS);

        this.load();
    }
}

ypSlideOutMenu.prototype.load = function()
{
    var d = document;
    var lyrId1 = this.id + "Container";
    var lyrId2 = this.id + "Content";
    var obj1 = (this.dom ? d.getElementById(lyrId1) : (this.ie ? d.all[lyrId1] : d.layers[lyrId1]));
    if (obj1)
        var obj2 = (this.ns4 ? obj1.layers[lyrId2] : (this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)));
    var temp;

    if (!obj1 || !obj2)
        window.setTimeout(this.gRef + ".load()", 100);
    else
    {
        this.container  = obj1;
        this.menu       = obj2;
        this.style      = (this.ns4 ? this.menu : this.menu.style);
        this.homePos    = eval("0" + this.dirType + this.dim);
        this.outPos     = 0;
        this.accelConst = (this.outPos - this.homePos) / this.aniLen / this.aniLen;

        // set event handlers.
        if (this.ns4)
            this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
        this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')");
        this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "')");

        //set initial state
        this.endSlide();
    }
}

ypSlideOutMenu.showMenu = function(id)
{
    var reg = ypSlideOutMenu.Registry;
    var obj = ypSlideOutMenu.Registry[id];

    if (obj.container) {
        obj.over = true;

        // close other menus.
        for (menu in reg)
            if (id != menu)
                ypSlideOutMenu.hide(menu);

        // if this menu is scheduled to close, cancel it.
        if (obj.hideTimer)
            reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer);

        // if this menu is closed, open it.
        if (!obj.open && !obj.aniTimer)
            reg[id].startSlide(true);
    }
}

ypSlideOutMenu.hideMenu = function(id)
{
    // schedules the menu to close after <hideDelay> ms, which
    // gives the user time to cancel the action if they accidentally moused out
    var obj = ypSlideOutMenu.Registry[id];
    if (obj.container) {
        if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
        obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
    }
}

ypSlideOutMenu.hide = function(id)
{
    var obj = ypSlideOutMenu.Registry[id];
    obj.over = false;

    if (obj.hideTimer)
        window.clearTimeout(obj.hideTimer);

    // flag that this scheduled event has occured.
    obj.hideTimer = 0;

    // if this menu is open, close it.
    if (obj.open && !obj.aniTimer)
        obj.startSlide(false);
}

ypSlideOutMenu.prototype.startSlide = function(open) {
    this[open ? "onactivate" : "ondeactivate"]();
    this.open = open;
    if (open)
        this.setVisibility(true);
    this.startTime = (new Date()).getTime();
    this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution);
}

ypSlideOutMenu.prototype.slide = function() {
    var elapsed = (new Date()).getTime() - this.startTime;
    if (elapsed > this.aniLen)
        this.endSlide();
    else {
        var d = Math.round(Math.pow(this.aniLen-elapsed, 2) * this.accelConst);
        if (this.open && this.dirType == "-")
            d = -d;
        else if (this.open && this.dirType == "+")
            d = -d;
        else if (!this.open && this.dirType == "-")
            d = -this.dim + d;
        else
            d = this.dim + d;

        this.moveTo(d);
    }
}

ypSlideOutMenu.prototype.endSlide = function() {
    this.aniTimer = window.clearTimeout(this.aniTimer);
    this.moveTo(this.open ? this.outPos : this.homePos);
    if (!this.open)
        this.setVisibility(false);
    if ((this.open && !this.over) || (!this.open && this.over)) {
        this.startSlide(this.over);
    }
}

ypSlideOutMenu.prototype.setVisibility = function(bShow) {
    var s = (this.ns4 ? this.container : this.container.style);
    s.visibility = (bShow ? "visible" : "hidden");
}
ypSlideOutMenu.prototype.moveTo = function(p) {
    this.style[this.orientation == "h" ? "left" : "top"] = (this.ns4 ? p : p + "px");
}
ypSlideOutMenu.prototype.getPos = function(c) {
    return parseInt(this.style[c]);
}

// events
ypSlideOutMenu.prototype.onactivate     = function() { };
ypSlideOutMenu.prototype.ondeactivate   = function() { };



// Drop Down Menus: Edit to control positioning:
// Parameters: (Name, Direction, Left, Top, Width, NumberElements)
// the numbers you pass to "Left" and "Top" don't matter since they will get changed onactivate
var heightOfEachElement = 24;
var topBorderHeight = 1;

// If we accidentally have a nav item that takes up two lines, it will be cut off.
// Specify buffer space here.  Note that a mouse in the buffer space below a dropdown,
// if it isn't used, will be considered "in the menu" and will not hide the menu, which
// can be frustrating to the user if they are below the menu and want it to go away.  Set
// to 1000 and test if you don't understand what I'm saying.  Bottomline, dont set this
// too big.
var bufferSpace = 25;

var ddm1 = new ypSlideOutMenu("enrollInfoMenu", "down", 98, 98, 163, 5);
var ddm2 = new ypSlideOutMenu("ourProgramMenu", "down", 252, 98, 173, 4);
var ddm3 = new ypSlideOutMenu("howItWorksMenu", "down", 418, 98, 163, 4);
var ddm4 = new ypSlideOutMenu("interactiveCommunityMenu", "down", 641, 98, 175, 3);
var ddm5 = new ypSlideOutMenu("requestInfoMenu", "down", 641, 98, 175, 2);

// The reposition function below may have been taken out if the dropdowns are left aligned not centered.
// Re-position menus to allow center layout:

	ddm1.onactivate = repositionMenu;
    ddm2.onactivate = repositionMenu;
    ddm3.onactivate = repositionMenu;
    ddm4.onactivate = repositionMenu;
    ddm5.onactivate = repositionMenu;

	function repositionMenu() {
	
        var topnavid;
        var ddm;
        
        switch(this.id)
        {
            case "enrollInfoMenu":           ddm = ddm1; topnavid = "enroll_info_topnav"; break;
            case "ourProgramMenu":           ddm = ddm2; topnavid = "our_program_topnav"; break;
            case "howItWorksMenu":           ddm = ddm3; topnavid = "how_it_works_topnav"; break;
            case "interactiveCommunityMenu": ddm = ddm4; topnavid = "interactive_community_topnav"; break;
            case "requestInfoMenu":          ddm = ddm5; topnavid = "request_info_topnav"; break;
        }
        
        //find the position of the given topnav and reposition the menu
        var loc = findPos(document.getElementById(topnavid));
        ddm.container.style ? ddm.container.style.left = loc[0] + "px" : ddm.container.left = loc[0];
        ddm.container.style ? ddm.container.style.top = loc[1] + "px" : ddm.container.top = loc[1];
        
	}


function ss(obj, status) {
    obj.className=(status==1)?"mi_on":"mi";
}


/**
 * This function finds the position of an element from the left of the screen.
 * It is used for finding where to place the ypSlideOutMenus above, and has one
 * or two tweaks for this purpose (for example, the add-one-pixel-in-IE snippet)
 * @param {Object} obj - the object to find the left position of
 */
function findPos(obj) {
    var curleft = curtop = 0;
    var objHeight = obj.offsetHeight;
    
    if (obj.offsetParent) {
        curleft = obj.offsetLeft;
        curtop = obj.offsetTop;
        while (obj = obj.offsetParent) {
            curleft += obj.offsetLeft;
            curtop += obj.offsetTop;
        }
    }
    
    
    //alter left in IE
    if (document.all) curleft++;
    
    //start the menu below the element (2 for borders)
    curtop += objHeight;
    
    return [curleft,curtop];
}

/**
 * When forms, etc., need javascript, we shouldn't display them at all.  Thus we should
 * open the page with divs containing these forms being hidden and use javascript to
 * cause them to appear.  This way it never shows up if they don't have JavaScript
 * enabled.  It is expected that a <noscript> message is present.
 * @param (String) divIDToShow - the div to display
 */
function showDivThatNeedsJavaScript(divIDToShow)
{
    $(divIDToShow).style.display = 'block';
}