hi=false;

//read font-size cookie

function setFontSize(x) {
	x=x + "%";
	if($('elastic1')!=null) $('elastic1').setStyle('font-size', x);
	if($('nav1')!=null) $('nav1').setStyle('font-size', x);
	if($('nav2')!=null) $('nav2').setStyle('font-size', x);
	if($('main-nav')!=null) $('main-nav').setStyle('font-size', x);
	if($('breadcrumb')!=null) $('breadcrumb').setStyle('font-size', x);
	if($('controls')!=null) $('controls').setStyle('font-size', x);	
	if($('footer')!=null)$('footer').setStyle('font-size', x);
	if($('doc-footer')!=null) $('doc-footer').setStyle('font-size', x);
	if($('right-col')!=null) $('right-col').setStyle('font-size', x);		
}

function largeFont() {
	setFontSize(120);
	eraseCookie("knowledge-font-size");
	createCookie("knowledge-font-size", "largeFont", 21);
}

function mediumFont() {
	setFontSize(110);
	eraseCookie("knowledge-font-size");
	createCookie("knowledge-font-size", "mediumFont", 21);
}

function smallFont() {
	setFontSize(100);
	eraseCookie("knowledge-font-size");
	createCookie("knowledge-font-size", "smallFont", 21);
}
/* DD Issue 484-3-(b)-2 Added Text with A when CSS will be disabled */
function writeControls() {
	document.write ('<div id="font-size">\n')
	document.write ('<h3>Font size:</h3> <ul><li><a class="small-font" title="Small font size" href="javascript:smallFont()">A<span class="removed"> Small font size </span></a></li>\n')
	document.write ('<li><a class="medium-font" title="Medium font size" href="javascript:mediumFont()">A<span class="removed"> Medium font size </span></a></li>\n')
	document.write ('<li><a class="large-font" title="Large font size" href="javascript:largeFont()">A<span class="removed"> Large font size </span></a></li></ul>\n')
	document.write ('</div>\n')
}

function createCookie(name,value,days) {

	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";

}

function readCookie(name) {

	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;

}

function eraseCookie(name) {
	createCookie(name,"",-1);
}


function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function mask(x) {
	for(a=0;a<=x.length-1;a++) {
		
		//find out out height and width (this will determine which mask to use)
		xH = x[a].height;	
		xW = x[a].width;
		
		//create our mask element
		xImg = document.createElement("img")
		xImg.setAttribute("src", "site-idk2/images/f/mask" + xH + "x" + xW + ".png");
		xImg.setAttribute("class","mask"); 
		xImg.setAttribute("alt",'');
		xImg.setAttribute("height",xH);
		xImg.setAttribute("width",xW);
		
		//append the image next to our base image - css should sort out the rest
		x[a].parentNode.appendChild(xImg);
	}
}

function elasticiseImages() {

	return;
	
	// base font size is 75% 
	baseSize = ".75";
	
	imgArr = new Array();
	
	var list = $$('#header img', '#middle-col img');	
	
	list.some(function(element, index) {
		imgArr[index] = element;
	});
	
	var list = $$('#header input', '#middle-col input');	
	
	list.some(function(element, index) {
		if(element.type=="image") imgArr.push(element);
	});
	
	for(a=0;a<=imgArr.length-1;a++) {
		
		el = imgArr[a];
	
		el.style.height = el.height / 16 / baseSize + "em";
		
		el.style.width = el.width / 16 / baseSize + "em";		
	
	}
	
}

window.addEvent('domready', function() {

	//get font size

	fontSize = readCookie("knowledge-font-size");

	if(fontSize) {
		if(fontSize.length>1) eval(fontSize + "()");
	}
							
	// are there masked elements on this page?		
	masks = getElementsByClassName(document.getElementById('middle-col'), 'img', 'masked');
	if(masks.length>0) mask(masks);
	
	//make images scalable by converting the height & width to ems
	elasticiseImages();
	
	//Handle social links opening in a clean window
	//handleSocialLinks();
	
	//add print button
	var list = $$('li.print');
	list.some(function(element, index) {
		element.innerHTML='<a href="javascript:print()">Print this page</a>'
	});
			
	//form focus	
		var list = $$('input.text', 'textarea.text');		
		list.some(function(element, index) {
			element.addEvent('focus', function(){
				element.setStyle('background-image', 'url(site-idk2/images/f/input-bg-focus.gif)');
			});
			element.addEvent('blur', function(){
				element.setStyle('background-image', 'url(site-idk2/images/f/input-bg.jpg)');
			});
		});
			
 
	// implement motools LH Navigation	
	if(!hi) {
			var list = $$('#left-col li a');
			list.some(function(element, index) {
			 
				var fx = new Fx.Styles(element, {duration:200, wait:false});
				
				var eBG = element.getStyle('background-color');
				eBG = eBG.substring(1, eBG.length);
						
				pClass = element.getParent().getStyle('background-image') != 'none';
				pLast = element.getParent().className.indexOf('last') > -1;
				pPod = element.getParent().getParent().getParent().className.indexOf('pod') > -1;
				
				if(!pClass && !pPod) { 
			 
					element.addEvent('mouseenter', function(){
						
						fx.start({
							'color': '#ffffff', 'background-color': '#6D82A1'
									
						});			
					});
				 
					element.addEvent('mouseleave', function(){
							
						fx.start({
							'color': '#000000',	'background-color': eval("'" + eBG + "'")
							
						});
			
					});
				
				}
			 
			});	 
		
		}
		
	//tips for navigation tabs					
	$each($$('#clipper li'),function(tab,index) {
		
		var new_index = index + 1;
		if(index>0) {
							
					tab.addEvent('mouseenter',function() {
						$('tip' + new_index).setStyle('visibility','visible');
					});
							
					tab.addEvent('mouseleave',function() {
						$('tip' + new_index).setStyle('visibility','hidden');
					});
					
					/*Jul 2008. Blank the titles so they don't interfer with new tab tips*/
					var aTags=tab.getElementsByTagName('a');
					if(aTags!=null) aTags[0].title="";	
					
					}		
	});

}); 

function clearThis(x) {
	if(x==y.value)y.value=''
}

/*Added by Gary to handle opening social book mark link windows*/
function handleSocialLinks() {

	$each($$('#sociallinks a'),function(aTag,index) {	
		aTag.onclick= function() {return openWin(this.href,'bookmarks window')};			
	});
	
}

function openWin(url,title) {

	  	var win = window.open (url, title,'location=no,status=no,scrollbars=yes,width=700,height=400');	
		if (window.focus) {win.focus();}
		return false;		 
	}