function ngr5()
{
document.navig5.src='img/navig/ngr5_538_3.gif';
}
function ng5()
{
document.navig5.src='img/navig/ng5_538_3.gif';
}
function ngr6()
{
document.navig6.src='img/navig/ngr6_538_3.gif';
}
function ng6()
{
document.navig6.src='img/navig/ng6_538_3.gif';
}
function ngr7()
{
document.navig7.src='img/navig/ngr7_538_3.gif';
}
function ng7()
{
document.navig7.src='img/navig/ng7_538_3.gif';
}