function updateProductCategoriesCombo()
{
	if ( !bIsLoading ) 
	{
		document.getElementById('selGroup').value=0;
		document.getElementById('selProduct').value=0;

		document.frmNav.submit();
	}
}

function updateProductGroupsCombo()
{
	if ( !bIsLoading ) 
	{
		document.getElementById('selProduct').value=0;

		document.frmNav.submit();
	}
}

function updateProductProductsCombo()
{
	if ( !bIsLoading ) 
	{
		document.frmNav.submit();
	}
}