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 var 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 eraseCookie(name) {
    createCookie(name,"",-1);
}

function setFontsize(size) {
	if (size == null || typeof(size) == "undefined") {
		size = readCookie("smart_Fontsize");
	}

	if (size != null && typeof(size) != "undefined" && size.length && size.indexOf('px') != -1) {
		jQuery('#main_content').css('fontSize', size);
		eraseCookie("smart_Fontsize");
		createCookie("smart_Fontsize",size,28);
	} else {
		eraseCookie("smart_Fontsize");
		createCookie("smart_Fontsize","100%",28);
	}
}