function bderecho(e) {
    if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2)) {
        alert("** Botón derecho deshabilitado **");
        return false;
    }else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) {
        alert("** Botón derecho deshabilitado **");
        return false;
    }
    return true;
} 

var expDays = 1; // dias para que la cookie expire
function SetCookie(name, value) {
    var argv = SetCookie.arguments;
    var argc = SetCookie.arguments.length;
    var expires = (argc > 2) ? argv[2] : null;
    var path = (argc > 3) ? argv[3] : null;
    var domain = (argc > 4) ? argv[4] : null;
    var secure = (argc > 5) ? argv[5] : false;
    document.cookie = name + "=" + escape(value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

function DeleteCookie(name) {
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = GetCookie(name);
    document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
var exp = new Date();
exp.setTime(exp.getTime() + (expDays * 24 * 60 * 60 * 1000));
function amt() {
    var count = GetCookie('count')
    if (count == null) {
        SetCookie('count', '1')
        return 1
    }
    else {
        var newcount = parseInt(count) + 1;
        DeleteCookie('count')
        SetCookie('count', newcount, exp)
        return count
    }
}

function getCookieVal(offset) {
    var endstr = document.cookie.indexOf(";", offset);
    if (endstr == -1)
        endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}