var cycledividend = .2;
//var cycledelay = 800;

function initTypewriter(sourceId, newSpeed, typeWindow) {
typeWindow.innerHTML = '';
message=document.getElementById(sourceId).innerHTML;
msgLength=message.length+1;
count=0;
typing=setInterval(function () { typeText(typeWindow, message);}, newSpeed);
}

function typeText(typeWindow, message) {
var cursorHTML='<span class="cursorChar">@</span>';
typeWindow = document.getElementById(typeWindow);
	
	if (count == msgLength)
	{
		clearInterval(typing);
		return;
	}
	else if (count == 0)
		typedPortion = '';
	else
		typedPortion = message.substring(0, count);
		cursorChar = message.charAt(count);
	if (/</.test(cursorChar))
	{
		var tag = message.substring(count).match(/<\/?[^>]+>/);
		if (tag)
		{
			typedPortion += tag[0];
			count += tag[0].length;
		}
	}
	else
	{
		workHTML = '';
		workHTML += typedPortion;
		if (count != msgLength - 1)
			workHTML += cursorHTML.replace(/@/, cursorChar);
		typeWindow.innerHTML = workHTML;
		count++;
	}
}

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function cycleText (htmlarray, DivId, transition, ivalue) {
	var i = 0;
	var htmltemp;
	cycleTextInner();
	
	function cycleTextInner () {
		//declare content by id of object
		var content = document.getElementById(DivId);
		//begin, load/fade in item
		if (ivalue > 1 || typeof ivalue == 'undefined') //if at end of item timer sequence
		{
			ivalue = 0;//start again
		}
		if (ivalue == 1)
		{
			//appear(content, 1); //disappear (supposedly)
			opacity(DivId,100,0,800);
		}
		if (ivalue == 0) //if at start
		{
			content.innerHTML = htmlarray[i]; //load next item from array
			//DivId.innerHTML = "test";
			//appear(content, 0);
			if (transition == 2) {
				opacity(DivId,0,100,0);
				initTypewriter(DivId, 30, DivId);
			} else {
				opacity(DivId,0,100,800);
			}
			
			if (i == (htmlarray.length-1))
			{
				i=0;
			}
			else
			{
				i++;
			}
		}
		ivalue = ivalue + cycledividend;
		if (transition == 2) {
			setTimeout(function () {cycleTextInner()} , cycledelay+((cycledelay/4)*2));
		} else {
			setTimeout(function () {cycleTextInner()} , cycledelay);
		}
	}
	
}

function setup_overlay(name,width,height) {
	vars=scrollAndScreen();
	var adjwidth=parseInt(width>(vars[2]-75)?vars[2]-75:width);
	var adjheight=parseInt(height>(vars[3]-75)?vars[3]-75:height);
	$('overlay').style.height=(document.body.scrollHeight>vars[3]?document.body.scrollHeight:vars[3])+'px';
	$('overlay').style.display='';
	$('home_od').style.width=adjwidth+'px';
	$('home_od').style.height=(adjheight+25)+'px';
	$('home_od').style.left=vars[0]+(vars[2]-adjwidth)/2+'px';
	$('home_od').style.top=vars[1]+(vars[3]-(adjheight+25))/2+'px';
	$('home_od').style.display='';
	$('home_id').style.overflowX=(adjwidth<width?'scroll':'hidden');
	$('home_id').style.overflowY=(adjheight<height?'scroll':'hidden');
	$('home_id').style.width=adjwidth+'px';
	$('home_id').style.height=adjheight+'px';
	$('title').innerHTML=name;
}

function load_image(src,name,width,height) {
	setup_overlay(name,width,height);
	$('image').src='/file_uploads/'+src+'';
}

function load_url(src,name,width,height) {
	setup_overlay(name,width,height);
	$('image').style.display='none';
	$('url').style.display='';
	$('url').style.width=width+'px';
	$('url').style.height=height+'px';
	window.url.location.href=src;
}

function close_overlay() {
	$('overlay').style.display='none';
	$('home_od').style.display='none';
	$('title').innerHTML='';
	$('url').style.display='none';
	$('image').style.display='';
	$('image').src='/images/spinner.gif';
	window.url.location.href='/ereg/popups/sessiondetails.php';
}

function $(val) {
	return document.getElementById(val);
}