var menuSelect = new Array( 'panel1' , 'panel2' , 'panel3' , 'panel4' , 'panel5' , 'panel6' , 'panel7' , 'panel8' , 'panel9' , 'panel10' , 'panel11' , 'panel12' );

function clearInfo(tab) {
	for ( i = 0 ; i < menuSelect.length ; i++ ) {
//		if ( i != tab ) {
			var item = menuSelect[i];
			if (document.getElementById) {
					document.getElementById(item).style.visibility = "hidden";
				}
			else if (document.layers) {
					document.layers[i].visibility = 'hidden'; 
				}
			else {
					document.all[i].style.visibility = "hidden";
				}
//			}
	}
	
}

function showInfo(tab) {
	clearInfo(tab);
	var item = menuSelect[tab];
	if (document.getElementById) {
			if ( document.getElementById(item).style.visibility == "visible" )
				document.getElementById(item).style.visibility = "hidden";
			else
				document.getElementById(item).style.visibility = "visible";
			}
	else if (document.layers) {
			if ( document.layers[tab].visibility == "visible") {
				document.layers[tab].visibility = 'hidden'; 
				}
			else {
				document.layers[tab].visibility = "visible"; 
				}
			}
	else {
			if ( document.all[tab].style.visibility == "visible" )
				document.all[tab].style.visibility = "hidden";
			else
				document.all[tab].style.visibility = "visible";
			}
}

function setXpos() {
	var xwid = document.body.offsetWidth;
	if ( xwid >= 800 ) {
		xwid = (xwid - 800)/2 + 40;
	}
	else {
		xwid = 40;
	}

	for ( i = 0 ; i < 12 ; i++ ) {
			var item = menuSelect[i];
			if (document.getElementById) {
				document.getElementById(item).style.left = xwid;
			}
			else if (document.layers) {
				document.layers[i].position.left = xwid;
			}
			else {
				document.all[i].style.position.left = xwid;
			}
	}
}