var delay = 3000;
var start_frame = 0;

function init() {
	var lis = $('slide-images').getElementsByTagName('li');
	
	for( i=0; i < lis.length; i++){
		if(i!=0){
			lis[i].style.display = 'none';
		}
	}
	end_frame = lis.length -1;
	
	start_slideshow(start_frame, end_frame, delay, lis);
	
	
}

function start_slideshow(start_frame, end_frame, delay, lis) {
	setTimeout(fadeInOut(start_frame,start_frame,end_frame, delay, lis), delay);
}


function fadeInOut(frame, start_frame, end_frame, delay, lis) {
	return (function() {
		lis = $('slide-images').getElementsByTagName('li');
		Effect.Fade(lis[frame]);
		if (frame == end_frame) { frame = start_frame; } else { frame++; }
		lisAppear = lis[frame];
		setTimeout("Effect.Appear(lisAppear);", 0);
		setTimeout(fadeInOut(frame, start_frame, end_frame, delay), delay + 1850);
	})
	
}





// correctly handle PNG transparency in Win IE 5.5 or higher.
function correctPNG(){
   	for(var i=0;i<document.images.length; i++){
	var img = document.images[i]
	var imgName = img.src.toUpperCase()
	if (imgName.substring(imgName.length-3, imgName.length) == "PNG"){
		var imgID = (img.id) ? "id='" + img.id + "' " : ""
		var imgClass = (img.className) ? "class='" + img.className + "' " : ""
		var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
		var imgStyle = "display:inline-block;" + img.style.cssText 
		if (img.align == "left") imgStyle = "float:left;" + imgStyle
		if (img.align == "right") imgStyle = "float:right;" + imgStyle
		if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle		
		var strNewHTML = "<span " + imgID + imgClass + imgTitle + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + "; " + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src=\'" +img.src + "\', sizingMethod='scale');\"></span>" 
		img.outerHTML = strNewHTML
		i = i-1
	}
	}
}


// FORM HANDLER

function formChecker(formName){
	Event.observe(formName, 'submit', checkForm);
}

function checkForm(e){
	thisForm = Event.element(e);
	var error = 'no'
	//var required = $(thisForm).getElementsByClassName('req');		// Prototype 1.5
	var required = $(thisForm).select('input.req');					// Prototype 1.6 +
	
	required.each(function(n){
		
		myDaddy = n.up();
		if (n.next('img') !== undefined) n.next('img').remove();
		if ($F(n) == '' || typeof $F(n) == 'undefined'){
			new Insertion.After(n,"<img src=\"images/alert.gif\" />");
			error = 'yes';
		}
	});
	if (error === 'yes'){
		Event.stop(e);
		alert("There are one or more errors in your enquiry. Please check the highlighted fields and try again.");
	}
}