function showMe(id) {
    obj=document.getElementById(id);
	obj.style.visibility = "visible";
	document.getElementById('work').style.backgroundColor = '#FCED00';
}
            
function hideMe(id) {
    obj=document.getElementById(id);
	obj.style.visibility = "hidden";
	document.getElementById('work').style.backgroundColor = '#00726F';
}

function roll1(id) {
	document.getElementById('nav1').style.backgroundColor = '#00726F';
}
            
function roll2(id) {
	document.getElementById('nav1').style.backgroundColor = '#FCED00';
}

function roll3(id) {
	document.getElementById('nav3').style.backgroundColor = '#00726F';
}
            
function roll4(id) {
	document.getElementById('nav3').style.backgroundColor = '#FCED00';
}