function changeFont(value) {
	if (value =="11px") {
		stile = "style/style_catalogo.css";
	}
	if (value =="12px") {
		stile = "style/style_catalogo12.css";
	}
	if (value =="14px") {
		stile = "style/style_catalogo14.css";
	}
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel")== "stylesheet") {
      a.setAttribute("href",stile);
    }
   }
	
	setCookie("bodyfont",value,365);
	if (value =="11px") {
		document.getElementById('11px').innerHTML="Ab";
		document.getElementById('12px').innerHTML="<a href=\"javascript:changeFont('12px');\" class=\"font2\">Ab</a>";
		document.getElementById('14px').innerHTML="<a href=\"javascript:changeFont('14px');\" class=\"font3\">Ab</a>";
	}
	if (value =="12px") {
		document.getElementById('11px').innerHTML="<a href=\"javascript:changeFont('11px');\" class=\"font1\">Ab</a>";
		document.getElementById('12px').innerHTML="Ab";
		document.getElementById('14px').innerHTML="<a href=\"javascript:changeFont('14px');\" class=\"font3\">Ab</a>";
	}
	if (value =="14px") {
		document.getElementById('11px').innerHTML="<a href=\"javascript:changeFont('11px');\" class=\"font1\">Ab</a>";
		document.getElementById('12px').innerHTML="<a href=\"javascript:changeFont('12px');\" class=\"font2\">Ab</a>";
		document.getElementById('14px').innerHTML="Ab";
	}
}

function setCookie(c_name,value,expiredays) {
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function getCookie(c_name) {
	if (document.cookie.length>0) {
		c_start=document.cookie.indexOf(c_name + "=");
	  	if (c_start!=-1) {
			c_start=c_start + c_name.length+1 ;
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) {
				setCookie(c_name,'12px',365);
				changeFont('12px');
			}else{
				changeFont(unescape(document.cookie.substring(c_start,c_end)));
			}
		}else{
			setCookie(c_name,'12px',365);
			changeFont('12px');
		}
	}else{
		setCookie(c_name,'12px',365);
		changeFont('12px');
	}
}