function vat_number_onclick(f) {
	if(f.checked==true){vat_number_show();}else{vat_number_hide();}
}

function vat_number_get_row() {
	try	{ return document.getElementById('vat_number_row');	} catch (ex) {}
}

function vat_number_show() {
	try	{ vat_number_get_row().style.visibility = 'visible'; } catch (ex) {}
}

function vat_number_hide() {
	try	{ vat_number_get_row().style.visibility = 'hidden'; } catch (ex) {}
}

function vat_number_get() {
	try	{ return document.getElementById( 'vat_number' ).value;	} catch (ex) { return 0; }
}

function vat_number_validate( vat_number ) {
	
	return checkVATNumber( vat_number );
}