function hideProj() {
	var m = document.getElementById("drop");   
        m.style.visibility = "hidden";
}

function showProj() {
        var m = document.getElementById("drop");   
        m.style.visibility = "visible";
}

function hideWir() {
	var m = document.getElementById("drop2");   
        m.style.visibility = "hidden";
}

function showWir() {
        var m = document.getElementById("drop2");   
        m.style.visibility = "visible";
}