function showForm(showId,hideId)
{
	document.getElementById(showId).style.display="block";
	document.getElementById(hideId).style.display="none";
}

function GetSelectedItem() 
{
	len = document.addMaterial.program.length
	i = 0
	chosen = "none"

	for (i = 0; i < len; i++) 
	{
		if (document.addMaterial.program[i].selected) 
		{
			chosen = document.addMaterial.program[i].value
		}
	}
	
	if(chosen == 'Other')
	{
		//alert('kom maar input veldje..!!');
		document.getElementById('hiddenInput').style.display = '';
	}
	else
	{
		//alert('verdwijn maar input veldje..!!');
		document.getElementById('hiddenInput').style.display = 'none';
	}
}

function popup(page,title,width,height) 
{
	var winl = (screen.width - width) / 2;
	var wint = (screen.height - height) / 2; 
	window.open(''+page,''+title,'width='+width+',height='+height+',top='+wint+',left='+winl+',resizable=no,scrollbars=yes,toolbar=no'); 
}