function mail(u, s, d, img)
{
var l="ilto";
	if (img == "txt")
		{document.write("<a"+" href="+"ma"+l+":"+u+"&#64;"+s+ "." +d+">"+u+"&#64;"+s+ "." +d+"</a>");}
	else
		{document.write("<a"+" href="+"ma"+l+":"+u+"&#64;"+s+ "." +d+">"+"<img id=\"ico_m\" src=\""+img+"\" alt=\"E-mail\" /></a>");}
}

function select(arg)
{
i=0;
var all = new Array("technologies", "equipment", "materials");
if (document.getElementById(arg).style.display == "none")
	{
	for (i=0; i < all.length; i++)
		{
		document.getElementById('h_' + all[i]).className = "direct";
		document.getElementById(all[i]).style.display = "none";
		}
	document.getElementById('h_' + arg).className = "direct_on";
	document.getElementById(arg).style.display = "block";
	}
else
	{
	document.getElementById('h_' + arg).className = "direct";
	document.getElementById(arg).style.display = "none";
	}
}