function showMenu1(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
} 

function showMenu2(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
}
function showMenu3(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
}
function showMenu4(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
}
function showMenu5(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
}
function showMenu6(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden';
}
function showMenu7(id){ 
document.getElementById(id).style.visibility='visible';
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
}

function hideMenu() { 
if (document.getElementById) { 
document.getElementById('dropmenu1').style.visibility='hidden';
document.getElementById('dropmenu2').style.visibility='hidden';
document.getElementById('dropmenu3').style.visibility='hidden';
document.getElementById('dropmenu4').style.visibility='hidden';
document.getElementById('dropmenu5').style.visibility='hidden';
document.getElementById('dropmenu6').style.visibility='hidden';
document.getElementById('dropmenu7').style.visibility='hidden'; 
} 
} 
function changeClass(elementID, newClass) {
	var element = document.getElementById(elementID);
	element.className = newClass;
	//element.setAttribute("class", newClass); //For Most Browsers
	//element.setAttribute("className", newClass); //For IE; harmless to other browsers.
}