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

* File    : JSFX_SimpleRollover.js © JavaScript-FX.com

* 

* Created : 2001/03/19 

* 

* Author  : Roy Whittle www.Roy.Whittle.com 

* 

* Purpose : To create image rollovers.

*		For simple image swaps this code is a little too heavy. 

*		However, if you have pre image loads and multiple image

*		swaps then this can work out better by allowing the 

*		page to load faster.

*		The best feature is the "post" image load.

*

* History 

* Date         Version        Description 

* 

* 2001-03-18	1.0		Initial version for JavaScript-FX.com

* 2001-09-17	1.1		Made the interface the same as for animated 

*					and fading rollovers.

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

if(!window.JSFX)

	JSFX=new Object();



JSFX.RolloverObjects=new Array();



JSFX.Rollover = function(name, img)

{

	JSFX.RolloverObjects[name]= new Image();

	JSFX.RolloverObjects[name].img_src = img;	

	if(!JSFX.Rollover.postLoad)

		JSFX.RolloverObjects[name].src = img;

}

JSFX.Rollover.postLoad = false;

JSFX.Rollover.loadImages = function()

{

	var i;

	for(i in JSFX.RolloverObjects)

	{

		r=JSFX.RolloverObjects[i];

		r.src=r.img_src;

	}

}

JSFX.Rollover.error = function(n)

{

		alert("JSFX.Rollover - An Error has been detected\n"

			+ "----------------------------------\n"

			+ "You must define a JSFX.Rollover in your document\n"

			+ "JSFX.Rollover(\""+n+"\",\"your_on_img.gif\")\n"

			+ "(check the spelling of your JSFX.Rollovers)");

}

JSFX.findImg = function(n) 

{

	var img = JSFX.getImg(n, document);



	/*** Stop emails because the image was named incorrectly ***/

	if(!img)

	{

		alert("JSFX.Rollover - An Error has been detected\n"

			+ "----------------------------------\n"

			+ "You must define an image in your document\n"

			+ "<IMG SRC=\"your_image.ext\" NAME=\""+n+"\">\n"

			+ "(check the NAME= attribute of your images)");



		return(new Image());

	}

	return img;

}

JSFX.getImg = function(n, d) 

{

	var img = d.images[n];



	if(!img && d.layers)  

		for(var i=0 ; !img && i<d.layers.length ; i++) 

			img=JSFX.getImg(n,d.layers[i].document);



	return img;

}

JSFX.imgOn = function(imgName, rollName)

{

	if(rollName == null)

		rollName=imgName;



	/*** Stop emails because the rollover was named incorrectly ***/

	if(!JSFX.RolloverObjects[rollName])

	{

		JSFX.Rollover.error(rollName);

		return;

	}

	var img = JSFX.findImg(imgName);

	if(img.offSrc==null)

		img.offSrc=img.src;

	img.src=JSFX.RolloverObjects[rollName].img_src;

}

JSFX.imgOff = function(imgName)

{

	var img = JSFX.findImg(imgName);

	img.src=img.offSrc;

}