var Common = {
    toggleOptions : function(link, id) {
        var span = document.getElementById(link);
        var el = document.getElementById(id);
        if (el != null) {
            if (el.style.display == 'none' ) {
                el.style.display = 'block';
                el.style.width = '150px';
                span.innerHTML = 'Ẩn tùy chọn';
                Common.setCookie("ck_upload_option", 1, "2");
            } else {
                el.style.display = 'none';
                el.style.width = '0px';
                span.innerHTML = 'Hiển thị tùy chọn';
                Common.setCookie("ck_upload_option", 0, "2");
            }
        }
    },
    

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

    getCookie : function (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) c_end=document.cookie.length;
                return unescape(document.cookie.substring(c_start,c_end));
            }
        }
        return "";
    },
	
	SelectAll : function (id)
	{
		document.getElementById(id).focus();
		document.getElementById(id).select();
	}
};