// nav rollovers
function menuPopUp(id) {

        if (document.getElementById('nav_psm')) {
	  document.getElementById('nav_psm').style.display = "none";
        }
	if (document.getElementById('nav_jsm')) {
	  document.getElementById('nav_jsm').style.display = "none";
        }
	if (document.getElementById('nav_tns')) {
	  document.getElementById('nav_tns').style.display = "none";
        }
	//document.getElementById('nav_c').style.display = "none";
	

	if (document.getElementById(id).style.display == "none") 
			{	document.getElementById(id).style.display = "block";
				document.getElementById(id).style.zIndex = "100";
				 }
			else {
			document.getElementById(id).style.display = "none";  
		}
					
}


function menuHide(id) {
	document.getElementById(id).style.display = "none";
}