function addToCart(id, typeID) {
    location.href='?id=' + id + '&typeid=' + typeID;
}
function removeFromCart(remArtNr, typeID, artistID=0, label=0) {
    location.href='?remartnr=' + remArtNr + '&artistid=' + 
		  artistID + '&typeid=' + typeID + '&label=' + label;
}
function clearCart(typeID, artistID=0, label=0) {
	var url = '?id=' + -1;
    location.href='?id=' + -1 + '&artistid=' + artistID + 
		  '&typeid=' + typeID + '&label=' + label;
}
function goLabel()
{
    var label = document.forms.label.label[document.forms.label.label.selectedIndex].value;
    if(label > 0) {
	location.href='?label=' + label;
    }
}
function goArtist(label)
{
    var artistid = document.forms.artist.artistid[document.forms.artist.artistid.selectedIndex].value;
    if(artistid > 0) {
	location.href='?label=' + label + '&artistid=' + artistid;
    }
}
function goItemType(label=0)
{
    var typeid = document.forms.itemtype.typeid[document.forms.itemtype.typeid.selectedIndex].value;
    if(typeid > 0) {
	location.href='?label=' + label + '&typeid=' + typeid;
    }
}