// ISF1.11 :: Image swap-fade 

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

// DOM scripting by brothercake -- http://www.brothercake.com/

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

//global object

var isf = { 'clock' : null, 'fade' : true, 'count' : 0.099999, 'getDom' : ''}

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





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

 List the images that need to be cached

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



isf.imgs = [
	"./images/mouseover/img_0_0_0.jpg",
	"./images/mouseover/img_1_0_0.jpg",
	"./images/mouseover/img_2_0_0.jpg",
	"./images/mouseover/img_3_0_0.jpg",
	"./images/mouseover/img_4_0_0.jpg",
	"./images/mouseover/img_5_0_0.jpg",
	"./images/mouseover/img_6_0_0.jpg",
	"./images/mouseover/img_7_0_0.jpg",
	];


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

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





//cache the images

isf.imgsLen = isf.imgs.length;

isf.cache = [];

for(var i=0; i<isf.imgsLen; i++)

{

	isf.cache[i] = new Image;

	isf.cache[i].src = isf.imgs[i];

}



function getCmpString(israce) {

	/*if (israce != 1 && israce != 2) {

		if (service == 0 && tool == 0) {

			return findString('img_', '_0_0.jpg', isf.src);

		} else if (service != 0 && tool == 0 && race != 3) {

			return findString('img_'+industry+'_', '_0.jpg', isf.src);

		/*} else if (service != 0 && tool != 0 && (race != 1 || race != 3)) {

			return findString('img_'+industry+'_'+service+'_', '.jpg', isf.src);

		} else if (race == 1) {

			return findString('img_', '_0_0.jpg', isf.src);

		} else if (aboutrace == 1) {

			return findString('img_', '_0_0.jpg', isf.src);

		}*/

	if (israce == 1) {

		return findString('img_', '_0_0.jpg', isf.src);

	} else if (israce == 2) {

		return findString('img_'+industry+'_', '_0.jpg', isf.src);

	} else if (israce == 3) {

		return findString('img_'+industry+'_'+service+'_', '.jpg', isf.src);

	}

}



function findString(firstword, secondword, mainString) {

	var pos1 = mainString.indexOf(firstword) + firstword.length;

	var pos2 = mainString.lastIndexOf(secondword);

	return mainString.substring(pos1, pos2);

}



//swapfade setup function

function swapfade()

{

	//if the timer is not already going

	if(isf.clock == null)

	{

		//copy the image object 

		isf.obj = arguments[0];

		isf.getDOM = arguments[0];

		

		//copy the image src argument 

		isf.src = arguments[1];

		

		//store the supported form of opacity

		if(typeof isf.obj.style.opacity != 'undefined')

		{

			isf.type = 'w3c';

		}

		else if(typeof isf.obj.style.MozOpacity != 'undefined')

		{

			isf.type = 'moz';

		}

		else if(typeof isf.obj.style.KhtmlOpacity != 'undefined')

		{

			isf.type = 'khtml';

		}

		else if(typeof isf.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

			isf.type = (isf.obj.filters.length > 0 && typeof isf.obj.filters.alpha == 'object' && typeof isf.obj.filters.alpha.opacity == 'number') ? 'ie' : 'none';

		}

		else

		{

			isf.type = 'none';

		}

		

		//change the image alt text if defined

		if(typeof arguments[3] != 'undefined' && arguments[3] != '')

		{

			isf.obj.alt = arguments[3];

		}

		

		//if any kind of opacity is supported

		if(isf.type != 'none')

		{

			//copy and convert fade duration argument 

			//the duration specifies the whole transition

			//but the swapfade is two distinct transitions

			isf.length = parseInt(arguments[2], 10) * 150;

			

			//create fade resolution argument as 20 steps per transition

			//again, split for the two distrinct transitions

			isf.resolution = parseInt(arguments[2], 10) * 3;

			

			//start the timer

			var string_1 = findString("img", ".jpg", isf.src);

			var string_2 = findString("img", ".jpg", isf.obj.src);

			if (string_1 != string_2) {

				isf.clock = setInterval('isf.swapfade()', isf.length/isf.resolution);

				isf.count = 0.099999;

				//newDOM = document.getElementById('theslide');

				//stringb = findString('%68%61%6E%64%6C%65%4F%76%65%72%28', '%29', pillatt);

				//if (stringa != stringb) {

					

				//}

				//document.write(stringa);

			}

		}

		

		//otherwise if opacity is not supported

		else

		{

			//just do the image swap

			isf.obj.src = isf.src;

		}

		

	}

	else

	{

		//added by jvh on Sept 12

		//isf.clock = null;

		//isf.obj.src = isf.src;

		isf.count = 1;

		//isf.src = arguments[1];



	}

};





//swapfade timer function

isf.swapfade = function()

{

	//increase or reduce the counter on an exponential scale

	isf.count = isf.count * (1/0.81); 





	//if the counter has reached the bottom

	if(isf.count < (1 / isf.resolution))

	{

		//clear the timer

		clearInterval(isf.clock);

		isf.clock = null;



		//do the image swap

		isf.obj.src = isf.src;



		//reverse the fade direction flag

		isf.fade = false;

		

		//restart the timer

		isf.clock = setInterval('isf.swapfade()', isf.length/isf.resolution);



	}

	

	//if the counter has reached the top

	if(isf.count > (1 - (1 / isf.resolution)))

	{

		//clear the timer

		clearInterval(isf.clock);

		isf.clock = null;



		//reset the fade direction flag

		isf.fade = true;

		

		//reset the counter

		isf.count = 1;

		

		var maincmp = getCmpString(1);

		var seccmp = getCmpString(2);

		var thcmp = getCmpString(3);

		//alert(getCmpString(3));

		//alert(stringa);

		// Handle main menu and list items

		//if (maincmp != globid && (aboutrace == 0 || servicerace == 0 || toolrace == 0)) {

			if (maincmp != globid && (service == 0 && tool == 0)) {

				swapfade(document.getElementById('theslide'), './images/mouseover/img_'+globid+'_0_0.jpg', '1');

			} else if (race == 0 && globid != 7 && seccmp != globid && (service != 0 && tool == 0)) {

				swapfade(document.getElementById('theslide'), './images/mouseover/img_'+industry+'_'+globid+'_0.jpg', '1');

			} else if (race != 1 && race != 2 && maincmp != 0 && seccmp != 0 && thcmp != 0 && globid != 7 && thcmp != globid && (service != 0 && tool != 0)) {

				swapfade(document.getElementById('theslide'), './images/mouseover/img_'+industry+'_'+service+'_'+globid+'.jpg', '1');

			} 

		//} else {

			// Handle location pills and about box	

			if (race == 3 && globid == 7 && industry != 0) {

				race = 0;

				swapfade(document.getElementById('theslide'), './images/mouseover/img_7_0_0.jpg', '1');	

			} 

			if (race == 1 && seccmp != globid && service != 0) {

				

				swapfade(document.getElementById('theslide'), './images/mouseover/img_'+industry+'_0_0.jpg', '1');

			}

			if (race == 2 && (thcmp != 0 || seccmp != service) && (service != 0 && tool != 0)) {

				

				swapfade(document.getElementById('theslide'), './images/mouseover/img_'+industry+'_'+service+'_0.jpg', '1');

			}

			if (race == 4 && seccmp == 0) {

				swapfade(document.getElementById('theslide'), './images/mouseover/img_0_0_0.jpg', '1');

			}		

			//alert (maincmp);

			race = 0;

		//}

		

		

		

	}



	//set new opacity value on element

	//using whatever method is supported

	switch(isf.type)

	{

		case 'ie' :

			isf.obj.filters.alpha.opacity = isf.count * 100;

			break;

			

		case 'khtml' :

			isf.obj.style.KhtmlOpacity = isf.count;

			break;

			

		case 'moz' : 

			//restrict max opacity to prevent a visual popping effect in firefox

			isf.obj.style.MozOpacity = (isf.count == 1 ? 0.9999999 : isf.count);

			break;

			

		default : 

			//restrict max opacity to prevent a visual popping effect in firefox

			isf.obj.style.opacity = (isf.count == 1 ? 0.9999999 : isf.count);



	}

};