function showHome()
{
	homeclick.style.visibility = "visible";
}
function hideHome()
{
	homeclick.style.visibility = "hidden";
}
function showAboutUs()
{
	aboutusclick.style.visibility = "visible";
}
function hideAboutUs()
{
	aboutusclick.style.visibility = "hidden";
}
function showAppDev()
{
	appdevclick.style.visibility = "visible";
	proglang.style.visibility = "visible";
	compplat.style.visibility = "visible";
}
function hideAppDev()
{
	appdevclick.style.visibility = "hidden";
	proglang.style.visibility = "hidden";
	compplat.style.visibility = "hidden";
}
function showProgLang()
{
	appdevclick.style.visibility = "hidden";
	proglangclick.style.visibility = "visible";
	compplat.style.visibility = "visible";
}
function hideProgLang()
{
	proglangclick.style.visibility = "hidden";
	proglang.style.visibility = "hidden";
	compplat.style.visibility = "hidden";
}
function showCompPlat()
{
	appdevclick.style.visibility = "hidden";
	proglang.style.visibility = "visible";
	compplatclick.style.visibility = "visible";
}
function hideCompPlat()
{
	compplatclick.style.visibility = "hidden";
	proglang.style.visibility = "hidden";
	compplat.style.visibility = "hidden";
}
function showSecurity()
{
	securityclick.style.visibility = "visible";
}
function hideSecurity()
{
	securityclick.style.visibility = "hidden";
}

function showSoftArch()
{
	softarchclick.style.visibility = "visible";
}
function hideSoftArch()
{
	softarchclick.style.visibility = "hidden";
}
function showContact()
{
	contactclick.style.visibility = "visible";
}
function hideContact()
{
	contactclick.style.visibility = "hidden";
}