function goto(layer_ref, layer_ids) {
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById('placeholder').src = layer_ref;
		document.getElementById('popper').style.display = 'block';
		document.getElementById('imageIds').innerHTML = 'Image ID: ' + layer_ids;
	} 
	else { 
		if (document.layers) { // Netscape 4
			document.layers['popper'].display = 'block';
			document.layers['placeholder'].src = layer_ref;
			document.layers['imageIds'].innerHTML = 'Image ID: ' + layer_ids;
		} 
		else { // IE 4 
			document.all.layers['popper'].style.display = 'block';
			document.all.layers['placeholder'].src = layer_ref;
			document.all.layers['imageIds'].innerHTML = 'Image ID: ' + layer_ids;
		} 
	} 
}
function hidePic() {
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById('popper').style.display = 'none';
		document.getElementById('placeholder').src = '';
	} 
	else { 
		if (document.layers) { // Netscape 4
			document.layers['popper'].display = 'none';
			document.layers['placeholder'].src = '';	
		} 
		else { // IE 4 
			document.all.layers['popper'].style.display = 'none';
			document.all.layers['placeholder'].src = '';
		} 
	} 
}