var initial_font_size = 11;
var font_unity = 'px';
var delta = 1;
var fsize = initial_font_size;

function init_FontSize (ifs, fu, del){
	if(!isNaN(ifs))
		 initial_font_size = parseFloat(ifs);
	if("pt,pc,in,mm,cm,px,em,ex,%".indexOf (fu) != -1)
		 font_unity = fu;
	if(!isNaN(del))
		 delta = parseFloat(del);
	if(isNaN(parseFloat(document.getElementsByTagName('body')[0].style.fontSize)) || parseFloat(document.getElementsByTagName('body')[0].style.fontSize) == 0)
		 fsize = getFontSize ();
	else
	 fsize = parseFloat(document.getElementsByTagName('body')[0].style.fontSize);
	if(fsize != initial_font_size)
		 addFontSizeToLinks ();
		 document.getElementsByTagName('body')[0].style.fontSize = fsize + font_unity;
}
function incFontSize(){
	if(!isNaN(delta))
		 setFontSize (Math.round((parseFloat(fsize) + parseFloat(delta)) * 100) / 100);
}
function decFontSize(){
	if(!isNaN(delta))
		 setFontSize (Math.round((parseFloat(fsize) - parseFloat(delta)) * 100) / 100);
}
function setFontSize(newsize){
	if(!isNaN(newsize)){
		 fsize = Math.round((parseFloat(newsize)) * 100) / 100;
		 document.getElementsByTagName('body')[0].style.fontSize = fsize + font_unity;
		 addFontSizeToLinks ();
	}
}
function getFontSize(){
	var fs;
	if(document.location.search != "" && (document.location.search).match (/fsize=[0-9]+\.?[0-9]*/i))
		 fs = ("" + (document.location.search).match (/fsize=[0-9]+\.?[0-9]*/i)).replace (/fsize=/i, '');
	else
	 fs = initial_font_size;
	return fs;
}
function getDomainURL(URL){
	if(URL.match (/^((http:\/\/)?(www\.)?((([0-9a-z][0-9a-z-]+\.)+)([a-z]{2,3}))).*/))
		 return URL.match (/^((http:\/\/)?(www\.)?((([0-9a-z][0-9a-z-]+\.)+)([a-z]{2,3}))).*/)[1];
	else
	 return "";
}
function addFontSizeToLinks(){
	for(i = 0; i < document.links.length; i++){
		  if(!(document.links[i].href).match (/^mailto:/)
		     && !(document.links[i].href).match (/^(http:\/\/)?(www\.)?((([0-9a-z][0-9a-z-]+\.)+)([a-z]{2,3}))[\/]+$/)
		     && (document.links[i].href).indexOf (getDomainURL (self.location.href)) != -1
		  )
	{if((document.links[i].href).match (/fsize=[0-9]+\.?[0-9]{0,2}/i))
			 document.links[i].href = (document.links[i].href).replace (/fsize=[0-9]+\.?[0-9]{0,2}/i, ("fsize=" + fsize));
	 else
		if((document.links[i].href).indexOf ('?') != -1)
				document.links[i].href = document.links[i].href + "&fsize=" + fsize;
		else
		 document.links[i].href = document.links[i].href + "?fsize=" + fsize;
		}
	}
}