function changeImageDate1()
{
document.date1.src = "styles/images/arrow_down.gif";
document.date2.src = "styles/images/arrow_up2.gif";
document.valeur1.src = "styles/images/arrow_down2.gif";
document.valeur2.src = "styles/images/arrow_up2.gif";
document.secteur1.src = "styles/images/arrow_down2.gif";
document.secteur2.src = "styles/images/arrow_up2.gif";
}
function changeImageDate2()
{
document.date1.src = "styles/images/arrow_down2.gif";
document.date2.src = "styles/images/arrow_up.gif";
document.valeur1.src = "styles/images/arrow_down2.gif";
document.valeur2.src = "styles/images/arrow_up2.gif";
document.secteur1.src = "styles/images/arrow_down2.gif";
document.secteur2.src = "styles/images/arrow_up2.gif";
}

function changeImageValeur1()
{
document.date1.src = "styles/images/arrow_down2.gif";
document.date2.src = "styles/images/arrow_up2.gif";
document.valeur1.src = "styles/images/arrow_down.gif";
document.valeur2.src = "styles/images/arrow_up2.gif";
document.secteur1.src = "styles/images/arrow_down2.gif";
document.secteur2.src = "styles/images/arrow_up2.gif";
}
function changeImageValeur2()
{
document.date1.src = "styles/images/arrow_down2.gif";
document.date2.src = "styles/images/arrow_up2.gif";
document.valeur1.src = "styles/images/arrow_down2.gif";
document.valeur2.src = "styles/images/arrow_up.gif";
document.secteur1.src = "styles/images/arrow_down2.gif";
document.secteur2.src = "styles/images/arrow_up2.gif";
}

function changeImageSecteur1()
{
document.date1.src = "styles/images/arrow_down2.gif";
document.date2.src = "styles/images/arrow_up2.gif";
document.valeur1.src = "styles/images/arrow_down2.gif";
document.valeur2.src = "styles/images/arrow_up2.gif";
document.secteur1.src = "styles/images/arrow_down.gif";
document.secteur2.src = "styles/images/arrow_up2.gif";
}
function changeImageSecteur2()
{
document.date1.src = "styles/images/arrow_down2.gif";
document.date2.src = "styles/images/arrow_up2.gif";
document.valeur1.src = "styles/images/arrow_down2.gif";
document.valeur2.src = "styles/images/arrow_up2.gif";
document.secteur1.src = "styles/images/arrow_down2.gif";
document.secteur2.src = "styles/images/arrow_up.gif";
}