// 使用者字型大小
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 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 SetFont(size)
{
    document.getElementById("page_matter").style.fontSize=size;   
    createCookie('fontsize',size,30)
    
    //fontsize-current
    var link = document.getElementById("font_size").getElementsByTagName("a");   
    for (var i=0;i<link.length;i++)
    {
        link[i].className="";
    }  
    
    //lond fontsize-current     
    if(size=="0.8em")    
    {
        link[0].className="fontsize_current";
    }
    if(size=="1em")    
    {
        link[1].className="fontsize_current";
    }
    if(size=="1.2em")    
    {
        link[2].className="fontsize_current";
    }

}

function LoadFont()
{
    var fontsize;
    if(readCookie('fontsize')==null)
    {        
        createCookie('fontsize','1em',30);
        fontsize='1em';
    }
    else   
    {
        fontsize=readCookie('fontsize');
    }       
    
    SetFont(fontsize);     
}