var isIE = document.all;
var isNN = !document.all && document.getElementById;
var isN4 = document.layers;

function vis_div_transp() {
    var div_transp = self.document.getElementById("div_transp");
    if (isIE || isNN) {

        div_transp.style.visibility = "visible";
        div_transp.style.left = 0;
        div_transp.style.top = 0;
    }
    else if (isN4) {
        div_transp.visibility = "show";
        div_transp.style.left = 0;
        div_transp.style.top = 0;
    }
    if (navigator.appName.indexOf("Netscape") != -1) {
        var pri = self.document.body.scrollHeight;
        div_transp.style.height = pri;
        div_transp.style.MozOpacity = 0.55;
    }
    else {
        var pri = self.document.body.scrollHeight;
        div_transp.style.height = pri;      
        div_transp.style.filter = "alpha(opacity=60)";
        
    }
}
function hide_div_transp() {
    var div_transp = self.document.getElementById("div_transp");  
    if (isIE || isNN) {
        div_transp.style.visibility = "hidden";        
    }
    else if (isN4) {
        div_transp.style.visibility = "hide";       
    }
}

function apri_registrazione() {
    self.location.href = "Registrazione.aspx";
}

function rigioca() { 
self.location.href = "giocata.aspx";
}