// JavaScript Document

// 1000 = 1 sec
var maininterval = 7000
// Duration of crossfade (seconds)
var crossFadeDuration = 3
// image directory
var imagedir = "media/frontpage/rotating_features/"
var mainfeaturenum = 0
var mainURLnum = 0
var mainbuttonsnum = 0

//load array with images
mainfeatureImg = new Array();
mainfeatureImg[mainfeaturenum++] = imagedir + "swapshop_main.jpg";
mainfeatureImg[mainfeaturenum++] = imagedir + "relining_main.jpg";
mainfeatureImg[mainfeaturenum++] = imagedir + "terms_main.jpg";
mainfeatureImg[mainfeaturenum++] = imagedir + "onlineprobook_main.jpg";

mainfeatureURL = new Array()
mainfeatureURL[mainURLnum++] = "/swapshop";
mainfeatureURL[mainURLnum++] = "/asp/business_building/reline_registration.aspx";
mainfeatureURL[mainURLnum++] = "/asp/company_info/extended_terms.aspx";
mainfeatureURL[mainURLnum++] = "/probook";

//total images in array
var totMainImg = mainfeatureImg.length;

function getNextImage() {
	//% makes sure we don't increment over tot # of images
	mainfeaturenum = (mainfeaturenum+1) % totMainImg;
	
	var new_image = mainfeatureImg[mainfeaturenum];
	return(new_image);
}

function getPrevImage() {
	if (mainfeaturenum-1 < 0)
	{
	mainfeaturenum = totMainImg-1
	}
	else
	{
	mainfeaturenum = (mainfeaturenum-1) % totMainImg;
	}
	var new_image = mainfeatureImg[mainfeaturenum];
	return(new_image);
} 

function prevImage(place) {
	var new_image = getPrevImage();
	document[place].src = new_image;
}

function switchImage(place) {
	var new_image = getNextImage();
   if (document.all){
      document[place].style.filter="blendTrans(duration=2)"
      document[place].style.filter="blendTrans(duration=crossFadeDuration)"
      document[place].filters.blendTrans.Apply()      
   }	
	
	document[place].src = new_image;
	if (document.all){
      document[place].filters.blendTrans.Play()
   }	
	var recur_call = "switchImage('"+place+"')";
	maintimerID = setTimeout(recur_call, maininterval);
}

function gotomainlink() {
    document.location.href = mainfeatureURL[mainfeaturenum];
}