// IXF1.11 :: Image cross-fade 
// *****************************************************
// DOM scripting by brothercake -- http://www.brothercake.com/
//******************************************************

//global object
var ixf = { 'clock' : null, 'count' : 1 }

/*****************************************************************************
 List the images that need to be cached
*****************************************************************************/

ixf.imgs = [
	'images/index_slide_1.jpg',
	'images/index_slide_2.jpg',
	'images/index_slide_3.jpg'
	];

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



//cache the images
ixf.imgsLen = ixf.imgs.length;
ixf.cache = [];
for(var i=0; i<ixf.imgsLen; i++)
{
	ixf.cache[i] = new Image;
	ixf.cache[i].src = ixf.imgs[i];
}


//crossfade setup function
function crossfade()
{
	//if the timer is not already going
	if(ixf.clock == null)
	{
		//copy the image object 
		ixf.obj = arguments[0];
		
		//copy the image src argument 
		ixf.src = arguments[1];
		
		//store the supported form of opacity
		if(typeof ixf.obj.style.opacity != 'undefined')
		{
			ixf.type = 'w3c';
		}
		else if(typeof ixf.obj.style.MozOpacity != 'undefined')
		{
			ixf.type = 'moz';
		}
		else if(typeof ixf.obj.style.KhtmlOpacity != 'undefined')
		{
			ixf.type = 'khtml';
		}
		else if(typeof ixf.obj.filters == 'object')
		{
			//weed out win/ie5.0 by testing the length of the filters collection (where filters is an object with no data)
			//then weed out mac/ie5 by testing first the existence of the alpha object (to prevent errors in win/ie5.0)
			//then the returned value type, which should be a number, but in mac/ie5 is an empty string
			ixf.type = (ixf.obj.filters.length > 0 && typeof ixf.obj.filters.alpha == 'object' && typeof ixf.obj.filters.alpha.opacity == 'number') ? 'ie' : 'none';
		}
		else
		{
			ixf.type = 'none';
		}
		
		//change the image alt text if defined
		if(typeof arguments[3] != 'undefined' && arguments[3] != '')
		{
			ixf.obj.alt = arguments[3];
		}
		
		//if any kind of opacity is supported
		if(ixf.type != 'none')
		{
			//create a new image object and append it to body
			//detecting support for namespaced element creation, in case we're in the XML DOM
			ixf.newimg = document.getElementsByTagName('body')[0].appendChild((typeof document.createElementNS != 'undefined') ? document.createElementNS('http://www.w3.org/1999/xhtml', 'img') : document.createElement('img'));

			//set positioning classname
			ixf.newimg.className = 'idupe';
			
			//set src to new image src
			ixf.newimg.src = ixf.src

			//move it to superimpose original image
			ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
			ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
			
			//copy and convert fade duration argument 
			ixf.length = parseInt(arguments[2], 10) * 1000;
			//Change the multiploer from 1000 to 500
			//ixf.length = parseInt(arguments[2], 10) * 500;

			//create fade resolution argument as 20 steps per transition
			ixf.resolution = parseInt(arguments[2], 10) * 20;
			
			//start the timer
			ixf.clock = setInterval('ixf.crossfade()', ixf.length/ixf.resolution);
		}
		
		//otherwise if opacity is not supported
		else
		{
			//just do the image swap
			ixf.obj.src = ixf.src;
		}
		
	}
};


//crossfade timer function
ixf.crossfade = function()
{
	//decrease the counter on a linear scale
	ixf.count -= (1 / ixf.resolution);
	
	//if the counter has reached the bottom
	if(ixf.count < (1 / ixf.resolution))
	{
		//clear the timer
		clearInterval(ixf.clock);
		ixf.clock = null;
		
		//reset the counter
		ixf.count = 1;
		
		//set the original image to the src of the new image
		ixf.obj.src = ixf.src;
	}
	
	//set new opacity value on both elements
	//using whatever method is supported
	switch(ixf.type)
	{
		case 'ie' :
			ixf.obj.filters.alpha.opacity = ixf.count * 100;
			ixf.newimg.filters.alpha.opacity = (1 - ixf.count) * 100;
			break;
			
		case 'khtml' :
			ixf.obj.style.KhtmlOpacity = ixf.count;
			ixf.newimg.style.KhtmlOpacity = (1 - ixf.count);
			break;
			
		case 'moz' : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.MozOpacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
			ixf.newimg.style.MozOpacity = (1 - ixf.count);
			break;
			
		default : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.opacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
			ixf.newimg.style.opacity = (1 - ixf.count);
	}
	
	//now that we've gone through one fade iteration 
	//we can show the image that's fading in
	ixf.newimg.style.visibility = 'visible';
	
	//keep new image in position with original image
	//in case text size changes mid transition or something
	ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
	ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
	
	//if the counter is at the top, which is just after the timer has finished
	if(ixf.count == 1)
	{
		//remove the duplicate image
		ixf.newimg.parentNode.removeChild(ixf.newimg);
	}
};

//get real position method
ixf.getRealPosition = function()
{
	this.pos = (arguments[1] == 'x') ? arguments[0].offsetLeft : arguments[0].offsetTop;
	this.tmp = arguments[0].offsetParent;
	while(this.tmp != null)
	{
		this.pos += (arguments[1] == 'x') ? this.tmp.offsetLeft : this.tmp.offsetTop;
		this.tmp = this.tmp.offsetParent;
	}
	
	return this.pos;
};


///////////////////////////////////////////////////////////
/// Magic Image Rotation								///
///	v 1.0.1												///
/// Copyright 2007, Loyce Bradley Petrey				///
///	All Rights Reserved.								///
/// http://www.EchoChrist.com/MagicImage				///
/// webmaster@EchoChrist.com							///
///														///
///	This script is free to use as long as this notice 	///
/// remains unchanged and intact.					 	///
///														///
/// This program is free software: you can redistribute ///
///	it and/or modify it under the terms of the GNU 		///
///	General Public License as published by the Free 	///
///	Software Foundation. 								///
///														///
/// This program is distributed in the hope that it 	///
/// will be useful, but WITHOUT ANY WARRANTY; without 	///
///	even the implied warranty of MERCHANTABILITY or 	///
///	FITNESS FOR A PARTICULAR PURPOSE.  					///
/// 													///
///////////////////////////////////////////////////////////

//  ['URL to linked page', 'URL to image', 'Caption under picture']	//
//  The caption is not required and may be left blank like this:		//
//  ['URL to linked page', 'URL to image', '']							//
//  Add as many images as you like seperated by commmas					//
//  Almost ALL errors are caused by the url or path being wrong 		//
//  The LAST image declaration does NOT have a comma after it			//

var ImageLoad = 
[
['ListingStep1.asp', 	'images/index_slide_1.jpg', 	'Where do you want to go?'],		
['ListingStep1.asp', 	'images/index_slide_2.jpg', 	'Where do you want to go?'],		
['PMRegistration.asp', 	'images/index_slide_3.jpg', 	'Where do you want to go?'],		
];

var ImageCount		= 3;			//  *****  Change this to the total number of images loaded above  ***** 		//	
var ImageDelay		= 12000;			//  *****  Set this to the delay interval desired.  5000 = 5 seconds.			// 
var LinkTarget		= "_self"		//  *****  Defines where you want linked page to open. _self, _blank, _top, etc	//
var ImageIndex		= 0;			//  DO NOT ALTER	//
var FirstLoad 		= 0;			//  DO NOT ALTER	//
var QuickStartID 	= 0;  			//  DO NOT ALTER	//
var htmlString 		= ""			//  DO NOT ALTER 	//


//  This function rotates the image //
function ImageChange()

{		
if(FirstLoad == 0)						//  Determins if this is the first time function has run.   // 
{
	htmlString = '<center>';
	//htmlString = htmlString + '<font face = "Verdana" size="2">';		//  Font and Font Size for caption may be changed here	//
	htmlString = htmlString +'<a target="';
	htmlString = htmlString + LinkTarget;
	htmlString = htmlString + '" id="ImgLink" href="';
	htmlString = htmlString + ImageLoad[ImageIndex][0];
	htmlString = htmlString + '"><img border="0" src="';				//  Image border size may be changed here				//	
	htmlString = htmlString + ImageLoad[ImageIndex][1];
	htmlString = htmlString + '" id="RollingImg" alt="';
	htmlString = htmlString + ImageLoad[ImageIndex][2] + '"></a><br>';
	//htmlString = htmlString + ImageLoad[ImageIndex][2];
	//htmlString = htmlString + '</font>';
	htmlString = htmlString + '</center>';		

	document.getElementById('MagicImage').innerHTML = htmlString; 				
}
else
{
crossfade(document.getElementById('RollingImg'), ImageLoad[ImageIndex][1], '1', ImageLoad[ImageIndex][2] )
document.getElementById('ImgLink').href = ImageLoad[ImageIndex][0]
}

if(ImageIndex == ImageCount - 1)		//  This statement increments image displayed and resets if displaying last image  //
{										
ImageIndex= 0;																				
}																								
else																							
{																								
ImageIndex++;																					
}																										

if(FirstLoad == 0)						//  Determins if this is the first time function has run.   // 
{
SlowFinish();
}

}
//  End Funtion  //

//  This function ensures first banner is displayted without a delay  //
function  QuickStart()
{
QuickStartID=setInterval("ImageChange()", 1000);
}
//  End Funtion  //																		

//  This function sets display rate to user defined speed  //
function SlowFinish()
{
clearInterval(QuickStartID);
FirstLoad = 1;
setInterval("ImageChange()", ImageDelay);	 
}
//  End Funtion  //

QuickStart()