function AboutUs(f){
	if(f){visi="visible";}
	else{visi="hidden";}
	if(document.layers){document.about.visibility=visi;}
	if(document.all){document.all.about.style.visibility=visi;}
	if(document.getElementById){document.getElementById("about").style.visibility=visi;}
}

function ProductGallery(f){
	if(f){visi="visible";}
	else{visi="hidden";}
	if(document.layers){document.gallery.visibility=visi;}
	if(document.all){document.all.gallery.style.visibility=visi;}
	if(document.getElementById){document.getElementById("gallery").style.visibility=visi;}
} 

function AskUs(f){
	if(f){visi="visible";}
	else{visi="hidden";}
	if(document.layers){document.ask.visibility=visi;}
	if(document.all){document.all.ask.style.visibility=visi;}
	if(document.getElementById){document.getElementById("ask").style.visibility=visi;}
}