function showDiv(obj) {
        hideDiv();
        document.getElementById(obj).style.visibility = "visible";
    }

function showDiv2(obj) {
        document.getElementById(obj).style.visibility = "visible";
    }
    
function hideDiv() {
        document.getElementById("dolomiten").style.visibility = "hidden";
     }
     
function showDivit(obj) {
        hideDivit();
        document.getElementById(obj).style.visibility = "visible";
    }

function hideDivit() {
        document.getElementById("dolomiti").style.visibility = "hidden";
     }