function ascunde_tot()
{
	ascunde_1();
	ascunde_2();
	ascunde_3();
	ascunde_4();
}

function vizibil_1()
{
	document.getElementById('despre').style.visibility="visible";
}
function ascunde_1()
{
	document.getElementById('despre').style.visibility="hidden";
}

function vizibil_2()
{
	document.getElementById('tehnologie').style.visibility="visible";
}
function ascunde_2()
{
	document.getElementById('tehnologie').style.visibility="hidden";
}

function vizibil_3()
{
	document.getElementById('produse').style.visibility="visible";
}
function ascunde_3()
{
	document.getElementById('produse').style.visibility="hidden";
}

function vizibil_4()
{
	document.getElementById('info').style.visibility="visible";
}
function ascunde_4()
{
	document.getElementById('info').style.visibility="hidden";
}