if (parseInt(navigator.appVersion.substring(0,1))>=3) {//3.0 or greater.

//indice
preview=new Image();
logo1=new Image();
logo2=new Image();
logo3=new Image();
logo4=new Image();
logo5=new Image();
logo6=new Image();
logo7=new Image();
logo8=new Image();
logo9=new Image();
logo10=new Image();
logo11=new Image();
logo12=new Image();
logo13=new Image();
logo14=new Image();

//Immagini attrattive

logo1.src="images/roll_arte.gif";
logo2.src="images/roll_ville.gif";
logo3.src="images/roll_vini.gif";
logo4.src="images/roll_terme.gif";

//Immagini sport

logo5.src="images/roll_trekking.gif";
logo6.src="images/roll_climbing.gif";
logo7.src="images/roll_sci.gif";
logo8.src="images/roll_ciclismo.gif";
logo9.src="images/roll_equitazione.gif";
logo10.src="images/roll_golf.gif";

//Immagini aree

logo11.src="images/roll_area1.gif";
logo12.src="images/roll_area2.gif";
logo13.src="images/roll_area3.gif";
logo14.src="images/roll_area4.gif";

//Immagini principali

preview.src="images/finta.gif";

}

function display_n(num) {
if (parseInt(navigator.appVersion.substring(0,1))>=3) {//3.0 or greater.
 if (num=="1") {document.images['foto'].src=preview.src;}
 }
}

function display_h(num) {
if (parseInt(navigator.appVersion.substring(0,1))>=3) {//3.0 or greater.
 if (num=="1") {document.images['foto'].src=logo1.src;}
 if (num=="2") {document.images['foto'].src=logo2.src;}
 if (num=="3") {document.images['foto'].src=logo3.src;}
 if (num=="4") {document.images['foto'].src=logo4.src;}
 if (num=="5") {document.images['foto'].src=logo5.src;}
 if (num=="6") {document.images['foto'].src=logo6.src;}
 if (num=="7") {document.images['foto'].src=logo7.src;}
 if (num=="8") {document.images['foto'].src=logo8.src;}
 if (num=="9") {document.images['foto'].src=logo9.src;}
 if (num=="10") {document.images['foto'].src=logo10.src;}
 if (num=="11") {document.images['foto'].src=logo11.src;}
 if (num=="12") {document.images['foto'].src=logo12.src;}
 if (num=="13") {document.images['foto'].src=logo13.src;}
 if (num=="14") {document.images['foto'].src=logo14.src;}
}
}