function showhide( objShowHide ) {
	d=document;layer="";
	if ( d.getElementById ) {
		layer1 = d.getElementById( objShowHide ).style;
	}
	else if (d.layers) {
		layer1 = document.layers[ objShowHide ];
	}
	else {
		return 1;
	}
	
	if ( layer1.display == "" ) {
		layer1.display = "none";
	}
	if ( layer1.display != "none" ) {
		layer1.display = "none";
	}
	else {
		layer1.display = "block";
	}
}