var goodBrowser
var ms = navigator.appVersion.indexOf("MSIE")

function browserCheck() {

if ((ms>0) && (parseInt(navigator.appVersion.substring(ms+5, ms+6))) >= 4) {
	goodBrowser = true
} else {
	if((navigator.appName == "Netscape") && (parseInt(navigator.appVersion.substring(0, 1)) >= 4))
	goodBrowser = true
		}

function cAlt(image) {
	image.alt = "Click to view high resolution image"
	
	if (goodBrowser == true) {
		image.style.visibility = "visible"
	}
}
}


var imageArray = new Array()
var numImages = 1
var imageCount = 1
var imageObject
var loadState = 0


var waitGif = new Image()
waitGif.src = "../images/pleasewait.gif"

function preLoadArray(imgObj,srcArr) {
	if ((srcArr.length > 0) && (loadState == 0)) {

		imageObject = document.getElementById(imgObj)
		var imageSrc = imageObject.src
	
		imageArray[0] = new Image();
		imageArray[0].src = imageSrc;

			numImages = srcArr.length+1
			var imagePath = imageSrc.substring(0,imageSrc.lastIndexOf("/")+1)
			for (var i = 1; i < numImages; i++) {
    				imageArray[i] = new Image();
    				imageArray[i].src = imagePath + srcArr[i-1]
    			}
	

		}
	
		loadState = 1
	}

var imageArray2 = new Array()
var numImages2 = 1
var imageCount2 = 1
var imageObject2
var loadState2 = 0

function preLoadArray2(imgObj,srcArr) {

	if ((srcArr.length > 0) && (loadState2 == 0)) {

		imageObject2 = document.getElementById(imgObj)
		var imageSrc = imageObject2.src
	
		imageArray2[0] = new Image();
		imageArray2[0].src = imageSrc;

			numImages2 = srcArr.length+1
			var imagePath = imageSrc.substring(0,imageSrc.lastIndexOf("/")+1)
			for (var i = 1; i < numImages2; i++) {
    				imageArray2[i] = new Image();
    				imageArray2[i].src = imagePath + srcArr[i-1]
    			}
	

		}
	
		loadState = 1
	}



function preLoad() {
	if ((preLoad.arguments.length > 0) && (loadState == 0)) {
	
		imageObject = document.getElementById(preLoad.arguments[0])
		imageSrc = imageObject.src
	
		imageArray[0] = new Image();
		imageArray[0].src = imageSrc;
	
		if (isNaN(preLoad.arguments[1])) {
	
			numImages = preLoad.arguments.length
			var imagePath = imageSrc.substring(0,imageSrc.lastIndexOf("/")+1)
			
			

			for (var i = 1; i < numImages; i++) {
    				imageArray[i] = new Image();
    				imageArray[i].src = imagePath + preLoad.arguments[i];
    			}
	
		} else if (preLoad.arguments[1] > 1) {

			numImages = preLoad.arguments[1]
			var imageName = imageSrc.substring(0,imageSrc.lastIndexOf("."))

			for (var i = 1; i < numImages; i++) {
    				imageArray[i] = new Image();
    				imageArray[i].src = imageName + (i+1) + ".jpg";
    			}
	
		}
	
		if (numImages > 1) {
   	 	//setTimeout('swapImages()', 1000)
		}
	
		loadState = 1

	}
}

function swapImages() { 
	if (imageArray[imageCount-1].complete) {
		imageObject.src = imageArray[imageCount-1].src
	
	} else if (imageObject.src != waitGif.src) {
		imageObject.src = waitGif.src

		}
swapTimer = window.setTimeout('swapImages()', 1000);
}

function cycle() {
	if (numImages > 1) {

	if (imageCount == numImages) {
		imageCount = 0;
	}
	imageCount++;
	
	imageObject.src = imageArray[imageCount-1].src
	
	//swapImages();
	
	}
}

function cycle2() {
  

	if (numImages2 > 1) {

	if (imageCount2 == numImages2) {
		imageCount2 = 0;
	}
	imageCount2++;

        //window.alert("hello from cycle2")
	imageObject2.src = imageArray2[imageCount2-1].src
	
	//swapImages();
	
	}
}

function scrollsouth()
{
intdown=window.setInterval("window.scrollBy(0,010)",001)
}
function scrollnorth()
{
intup=window.setInterval("window.scrollBy(0,-010)",001)
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_scrolldown_over = newImage('../images/scrolldown_over.jpg');
		pre_scrollup_over = newImage('../images/scrollup_over.jpg');
		preloadFlag = true;
	}
}




function newImage(arg) {
	if (document.images) {
		var rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}


userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
mustInitImg = true;
function initImgID() {var di = document.images; if (mustInitImg && di) { for (var i=0; i<di.length; i++) { if (!di[i].id) di[i].id=di[i].name; } mustInitImg = false;}}

function findElement(n,ly) {
	var d = document;
	if (browserVers < 4)		return d[n];
	if ((browserVers >= 6) && (d.getElementById)) {initImgID; return(d.getElementById(n))}; 
	var cd = ly ? ly.document : d;
	var elem = cd[n];
	if (!elem) {
		for (var i=0;i<cd.layers.length;i++) {
			elem = findElement(n,cd.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (i=0;i<array.length;i+=2) {
			img = null; var n = array[i];
			if (d.images) {
				if (d.layers) {img = findElement(n,0);}
				else {img = d.images[n];}
			}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (!img && d.getElementsByName) {
				var elms = d.getElementsByName(n);
				if (elms) {
					for (j=0;j<elms.length;j++) {
						if (elms[j].src) {img = elms[j]; break;}
					}
				}
			}
			if (img) {img.src = array[i+1];}
		}
	}
}


function changeImages() {
	changeImagesArray(changeImages.arguments);
}


function toggleImages() {
	for (var i=0; i<toggleImages.arguments.length; i+=2) {
		if (selected == toggleImages.arguments[i])
			changeImagesArray(toggleImages.arguments[i+1]);
	}
}

function showmenu(elmnt)
{
document.getElementById(elmnt).style.visibility="visible";
}
function hidemenu(elmnt)
{
document.getElementById(elmnt).style.visibility="hidden";
}


function showprod(elmnt)
{
document.getElementById(elmnt).style.visibility="visible";
}
function hideprod(elmnt)
{
document.getElementById(elmnt).style.visibility="hidden";
}


function mailopenWin(url) {
	window.open(url,"_blank","fullscreen=yes,toolbar=no,location=no,status=no,resizable=no,scrollbars=no, title=no");
}


function newframe(url) {
searchLink = 'http://www.martinryan.co.uk/frameholders/productopen.html?' + url;
window.open(searchLink, '_top', 'fullscreen=yes, toolbar=no, location=no, status=no, resizable=no, scrollbars=no, title=no');

}

function newproduct() 	{
mainURL = parent.location.search.substring(1,parent.location.search.length);
	
		top.main.location = mainURL	

}	
	
function goBack() {
if (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion < "7.0")
{
window.history.go(-2);
}

else {
window.history.go(-1);
}
}
	
function fullScreenscroll(page) {
if (navigator.appName == "Microsoft Internet Explorer"){ // better be ie6 at least
window.open(page, '_blank', 'fullscreen=yes, scrollbars=yes, resizable=no').focus();
}
else { // i.e. if Firefox

window.open(page, '', 'width=' + (screen.width-5) + ',height=' + (screen.height-5) + ', scrollbars=yes, resizable=no, ').focus();
}
}