function showArrow_achterhoek()
{
document.getElementById("arrow_achterhoek").style.display="inline";
}
function hideArrow_achterhoek()
{
document.getElementById("arrow_achterhoek").style.display="none";
}

function showArrow_dutch_coast()
{
document.getElementById("arrow_dutch_coast").style.display="inline";
}
function hideArrow_dutch_coast()
{
document.getElementById("arrow_dutch_coast").style.display="none";
}

function showArrow_friese_meren()
{
document.getElementById("arrow_friese_meren").style.display="inline";
}
function hideArrow_friese_meren()
{
document.getElementById("arrow_friese_meren").style.display="none";
}

function showArrow_drenthe()
{
document.getElementById("arrow_drenthe").style.display="inline";
}
function hideArrow_drenthe()
{
document.getElementById("arrow_drenthe").style.display="none";
}

function showArrow_flevoland()
{
document.getElementById("arrow_flevoland").style.display="inline";
}
function hideArrow_flevoland()
{
document.getElementById("arrow_flevoland").style.display="none";
}

function showArrow_friesland()
{
document.getElementById("arrow_friesland").style.display="inline";
}
function hideArrow_friesland()
{
document.getElementById("arrow_friesland").style.display="none";
}

function showArrow_gelderland()
{
document.getElementById("arrow_gelderland").style.display="inline";
}
function hideArrow_gelderland()
{
document.getElementById("arrow_gelderland").style.display="none";
}

function showArrow_groningen()
{
document.getElementById("arrow_groningen").style.display="inline";
}
function hideArrow_groningen()
{
document.getElementById("arrow_groningen").style.display="none";
}

function showArrow_het_gooi()
{
document.getElementById("arrow_het_gooi").style.display="inline";
}
function hideArrow_het_gooi()
{
document.getElementById("arrow_het_gooi").style.display="none";
}

function showArrow_ijsselmeer()
{
document.getElementById("arrow_ijsselmeer").style.display="inline";
}
function hideArrow_ijsselmeer()
{
document.getElementById("arrow_ijsselmeer").style.display="none";
}

function showArrow_kop_noord_holland()
{
document.getElementById("arrow_kop_noord_holland").style.display="inline";
}
function hideArrow_kop_noord_holland()
{
document.getElementById("arrow_kop_noord_holland").style.display="none";
}

function showArrow_limburg()
{
document.getElementById("arrow_limburg").style.display="inline";
}
function hideArrow_limburg()
{
document.getElementById("arrow_limburg").style.display="none";
}

function showArrow_noord_beveland()
{
document.getElementById("arrow_noord_beveland").style.display="inline";
}
function hideArrow_noord_beveland()
{
document.getElementById("arrow_noord_beveland").style.display="none";
}

function showArrow_noord_brabant()
{
document.getElementById("arrow_noord_brabant").style.display="inline";
}
function hideArrow_noord_brabant()
{
document.getElementById("arrow_noord_brabant").style.display="none";
}

function showArrow_noord_holland()
{
document.getElementById("arrow_noord_holland").style.display="inline";
}
function hideArrow_noord_holland()
{
document.getElementById("arrow_noord_holland").style.display="none";
}

function showArrow_noord_kennemerland()
{
document.getElementById("arrow_noord_kennemerland").style.display="inline";
}
function hideArrow_noord_kennemerland()
{
document.getElementById("arrow_noord_kennemerland").style.display="none";
}

function showArrow_overijssel()
{
document.getElementById("arrow_overijssel").style.display="inline";
}
function hideArrow_overijssel()
{
document.getElementById("arrow_overijssel").style.display="none";
}

function showArrow_schouwen_duiveland()
{
document.getElementById("arrow_schouwen_duiveland").style.display="inline";
}
function hideArrow_schouwen_duiveland()
{
document.getElementById("arrow_schouwen_duiveland").style.display="none";
}

function showArrow_twente()
{
document.getElementById("arrow_twente").style.display="inline";
}
function hideArrow_twente()
{
document.getElementById("arrow_twente").style.display="none";
}

function showArrow_utrecht()
{
document.getElementById("arrow_utrecht").style.display="inline";
}
function hideArrow_utrecht()
{
document.getElementById("arrow_utrecht").style.display="none";
}

function showArrow_veluwe()
{
document.getElementById("arrow_veluwe").style.display="inline";
}
function hideArrow_veluwe()
{
document.getElementById("arrow_veluwe").style.display="none";
}

function showArrow_walcheren()
{
document.getElementById("arrow_walcheren").style.display="inline";
}
function hideArrow_walcheren()
{
document.getElementById("arrow_walcheren").style.display="none";
}

function showArrow_west_friesland()
{
document.getElementById("arrow_west_friesland").style.display="inline";
}
function hideArrow_west_friesland()
{
document.getElementById("arrow_west_friesland").style.display="none";
}

function showArrow_zaanstreek()
{
document.getElementById("arrow_zaanstreek").style.display="inline";
}
function hideArrow_zaanstreek()
{
document.getElementById("arrow_zaanstreek").style.display="none";
}

function showArrow_zeeland()
{
document.getElementById("arrow_zeeland").style.display="inline";
}
function hideArrow_zeeland()
{
document.getElementById("arrow_zeeland").style.display="none";
}

function showArrow_zeeuws_vlaanderen()
{
document.getElementById("arrow_zeeuws_vlaanderen").style.display="inline";
}
function hideArrow_zeeuws_vlaanderen()
{
document.getElementById("arrow_zeeuws_vlaanderen").style.display="none";
}

function showArrow_zuid_beveland()
{
document.getElementById("arrow_zuid_beveland").style.display="inline";
}
function hideArrow_zuid_beveland()
{
document.getElementById("arrow_zuid_beveland").style.display="none";
}

function showArrow_zuid_limburg()
{
document.getElementById("arrow_zuid_limburg").style.display="inline";
}
function hideArrow_zuid_limburg()
{
document.getElementById("arrow_zuid_limburg").style.display="none";
}

function showArrow_zuid_holland()
{
document.getElementById("arrow_zuid_holland").style.display="inline";
}
function hideArrow_zuid_holland()
{
document.getElementById("arrow_zuid_holland").style.display="none";
}

function showArrow_zuid_kennemerland()
{
document.getElementById("arrow_zuid_kennemerland").style.display="inline";
}
function hideArrow_zuid_kennemerland()
{
document.getElementById("arrow_zuid_kennemerland").style.display="none";
}