function openPopupCentered(path,width,height)
{
	var left = (screen.width - width) / 2;
	var top  = (screen.height - height) / 2;
	
	var win = window.open(path,'Popup','width='+ width +',height='+ height +',left='+ left +',top='+ top +',channelmode=no,directories=no,status=yes,toolbar=no,menubar=no,location=no,resizable=yes,scrollbars=yes');
	win.focus();
}

function confirmDelete( name )
{
	return confirm( 'Weet u zeker dat u deze '+ name +' wilt verwijderen?' );
}

function SelectAttribute( attrid, attrname, fieldid, fieldvalue )
{	
	var oFieldId = window.opener.document.getElementById( fieldid );
	var oFieldValue = window.opener.document.getElementById( fieldvalue );
	
	if( oFieldId == null )
	{
		alert( 'Error: Field '+ fieldid +' can not be found!' );
		return;
	}
	
	if( oFieldValue == null )
	{
		alert( 'Error: Field '+ fieldvalue +' can not be found!' );
		return;
	}
	
	oFieldId.value		= attrid;
	oFieldValue.value	= attrname;
	
	window.close();
}

function SelectPage( attrid, fieldid )
{	
	var oFieldId = document.getElementById( fieldid );
	
	if( oFieldId == null )
	{
		alert( 'Error: Field '+ fieldid +' can not be found!' );
		return;
	}
	
	oFieldId.value = attrid;
	
	document.admin_page.btnSelect.click();
}