function check_numeric(inp)
{
	txt = inp.value;
	if ( ((txt * 1) != txt) || (txt.indexOf('.') >= 0) )
	{
		alert("Vul een positief geheel getal in.");
		inp.value = '0';
	}
}

function fotopopup(f)
{
	if (f != "")
	{
		window.open("fotopopup.php?f=" + f, "fotopopup", "width=430,height=420,toolbar=no,menubar=no,status=yes,resizable=yes");
	}
}
function printpopup(url)
{
	if (url != "")
	{
		window.open(url, "printpopup", "width=680,height=500,toolbar=yes,menubar=yes,status=yes,resizable=yes,scrollbars=yes");
	}
}
function infopopup(url)
{
	if (url != "")
	{
		window.open(url, "infopopup", "width=680,height=500,toolbar=no,menubar=yes,status=no,resizable=yes,scrollbars=yes");
	}
}
function artikeltonen(id, categorie)
{
	if (id != "")
	{
		self.location.href = "main.php?p=detailpagina&id=" + id + "&categorie=" + categorie + "&PHPSESSID=" + PHPSESSID;
	}
}
function swfpopup(url, w, h)
{
	bf_popup_window = window.open(url, "bf_popup", "width=" + w + ",height=" + h + ",menubar=false,toolbar=false,status=false");
	bf_popup_window.focus();
}
function voorraadpopup(url)
{
	if (url != "")
	{
		window.open(url, "voorraad", "width=250,height=200,toolbar=no,menubar=no,status=yes,resizable=yes,scrollbars=no");
	}
}
function show_info()
{
	expand("meer_informatie");
	expand("minder_informatie");
	expand("btn_meer_informatie");
	expand("btn_minder_informatie");
}
function expand(fArg)
{ 
	var elem = document.getElementById(fArg);
	if(elem.style.display == 'none')
	{
	  elem.style.display = '';
	}
	else
	{
	  elem.style.display = 'none';
	}
}