/*
	this script adjusts the font-size of the document in 10% increments.
	it checks for the sizing-widget id and then attaches click events 
	it also sets a cookie to rember the font size for 1 year form the last visit

*/

/*
	if javascript is turned off the links goto larger.html and smaller.html
	these pages should explain about what the widget is for and how to adjust 
	the font-size in the browser...
*/

function fontSizer()
{
	if (!document.getElementById) return false;
	
	if(document.getElementById('sizing-widget'))  {
		var increase=document.getElementById('larger');
		var decrease=document.getElementById('smaller');
		var myDate= new Date();
		expires=myDate.getFullYear()+1
		myDate.setFullYear(expires);
		expires='; expires='+myDate.toGMTString();
		
		increase.onclick= function() {
			//get the calculated font-size
			if (document.getElementsByTagName('body')[0].style.fontSize)  {
				var currentSize=document.getElementsByTagName('body')[0].style.fontSize;
				
				currentSize=currentSize.match(/([0-9]+)/);
				currentSize=(Number(currentSize[0])+10)+'%';

			}else{//no calculated font size so we are just starting
				var currentSize='110%';
			}
			
			document.getElementsByTagName('body')[0].style.fontSize=currentSize;
			document.cookie="fontSize="+currentSize+expires;
			return false;
		}
		
		decrease.onclick= function() {
			//get the calculated font-size
			if (document.getElementsByTagName('body')[0].style.fontSize)  {
				var currentSize=document.getElementsByTagName('body')[0].style.fontSize;
				currentSize=currentSize.match(/([0-9]+)/);
				currentSize=(Number(currentSize[0])-10);
				if (currentSize<60) currentSize=60;
				currentSize=currentSize+'%';
			}else{//no calculated font size so we are just starting
				var currentSize='90%';
			}
			document.getElementsByTagName('body')[0].style.fontSize=currentSize;
			document.cookie="fontSize="+currentSize+expires;
			return false;
			

		}
		
	
	}
}

/*
	Get the cookie and set the adjusted font-size
*/

function setFontSize ()  {
	var cookies=document.cookie;
	var cookieList=cookies.split(';');
	var fontSize='';

	for ( var i=0; i<cookieList.length; i++)  {
		if (cookieList[i].match('fontSize')) fontSize=cookieList[i];
	}
		if (fontSize)  {	
			fontSize=fontSize.match((/([0-9]+\%)/))[0];
			document.getElementsByTagName('body')[0].style.fontSize=fontSize;
		}
		
}