var initial_font_size = 0.8;  
var font_unity = 'em';  
var delta = 0.1;  
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;  
        }  
   }  
 }