function hidediv(strLayer) { 

if (document.getElementById) { // DOM3 = IE5, NS6 
	
	objlayer = "document.getElementById('"+strLayer+"')";
	objlayer = eval(objlayer);
	if (objlayer.style.display == ''){
	objlayer.style.display = 'none'; 
	}
	else{
	objlayer.style.display = ''; 
	}
} 
else { 
if (document.layers) { // Netscape 4 
	if (document.hideshow.visibility == 'visible'){
	document.hideshow.visibility = 'hidden';
	}
	else{
	document.hideshow.visibility = 'visible';
	}
} 
else { // IE 4 
document.all.hideshow.style.visibility = 'hidden'; 
} 
} 
}