function showhide(thisDiv, state) {

	if (state == 'visible') {
		state = 'hidden';
	}
	else {
		state = 'visible';
	}
	if (document.all) { //IS IE 4 or 5 (or 6 beta)
		eval( "document.all." + thisDiv + ".style.visibility = state");
	}
	if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[thisDiv].visibility = state;
	}
	if (document.getElementById && !document.all) {
		 document.getElementById(thisDiv).style.visibility = state;
	}
}