function clickIt(linkID){ 
    var myLink = ( document.getElementById )? 
                 document.getElementById(linkID) : document.all[linkID]; 
      if ( myLink.click ) { 
        myLink.click(); 
      } else if ( myLink.href ) { 
        if ( ! myLink.onclick ) { 
          window.location.href = myLink.href; 
        } else { 
          if ( false != myLink.onclick() ) { 
            window.location.href = myLink.href; 
          } 
        } 
      } 
    } 


function clickPrintFriendlyLinkFromServiceNavigation(linkID)
{
		clickIt(linkID);//link.click() does not work in firefox
}

function TopNav_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 expires = "";
	document.cookie = name+"="+value+expires+"; path=/; domain=.bromley.gov.uk";
}

function TopNav_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;
}

var maxSize = 1.15;
var minSize = 0.45;
var defaultSize = 0.7;


function changeFontSize(inc)
{  
	
	
	if(inc=="0")
	{
			newSize=defaultSize;
	}
	else
	{
			var strCurSize = document.body.style.fontSize;
			if(strCurSize=="")
			{
					strCurSize=  "" + defaultSize + "em";
			}
			var newSize = strCurSize.substring(0, strCurSize.indexOf("em"));

			newSize = newSize * inc;  

	}
	
	if(newSize <= maxSize && newSize >= minSize)//set some reasonable limits
	{
			var strSize = newSize + "em";
			document.body.style.fontSize = strSize;
			TopNav_CreateCookie('TopNav_FontSize',strSize,365) 
	}
	
	
	if(newSize==defaultSize)
	{
		enableLink(document.getElementById("incrementFontLink"));	
		enableLink(document.getElementById("decrementFontLink"));	
	}
	else
	{
		var nextSize = newSize * inc; 

		if(nextSize > maxSize)
		{
			disableLink(document.getElementById("incrementFontLink"));	
			enableLink(document.getElementById("decrementFontLink"));	
		}
		
		if(nextSize < minSize)
		{
			disableLink(document.getElementById("decrementFontLink"));	
			enableLink(document.getElementById("incrementFontLink"));	
		}
	}
}





function disableLink (link)
{
   link.tempTitle = link.title;    
   link.title = "";
   link.tempHref =  link.href;
   link.href = "javascript:void";
   link.className = "disabledLink";
}

function enableLink (link) 
{
	if(link.tempHref)
	{
		link.href = link.tempHref;
		link.title = link.tempTitle;
		link.className = "";
	}
}



window.onload = function(e) 
{
	var sizeCookie = TopNav_ReadCookie("TopNav_FontSize");

	if (sizeCookie != null)
	{
		document.body.style.fontSize = sizeCookie;
		
		var curSize = sizeCookie.substring(0, sizeCookie.indexOf("em"));
		
		var nextSize = curSize * 1.2;		
		if(nextSize > maxSize)
		{
			disableLink(document.getElementById("incrementFontLink"));	
		}
		else
		{
			nextSize = curSize * .8;	
			if(nextSize < minSize)
			{
				disableLink(document.getElementById("decrementFontLink"));	
			}
		}
	}

}