//Nav 1 
function nav1_over() {
	nav_out();
	document.getElementById('subnav1').style.display='inline';
}

//Nav 2
function nav2_over() {
	nav_out();
	document.getElementById('subnav2').style.display='inline';
}

//Nav 3
function nav3_over() {
	nav_out();
	document.getElementById('subnav3').style.display='inline';
}

//Nav 4
function nav4_over() {
	nav_out();
	document.getElementById('subnav4').style.display='inline';
}


//Nav Out
function nav_out() {
	document.getElementById('subnav1').style.display='none'
	document.getElementById('subnav2').style.display='none'
	document.getElementById('subnav3').style.display='none'
	document.getElementById('subnav4').style.display='none'
}