function ngr1()
{
document.navig1.src='../img/navig/ngr1_808_2.gif';
}
function ng1()
{
document.navig1.src='../img/navig/ng1_808_2.gif';
}
function ngr2()
{
document.navig2.src='../img/navig/ngr2_808_2.gif';
}
function ng2()
{
document.navig2.src='../img/navig/ng2_808_2.gif';
}
function ngr3()
{
document.navig3.src='../img/navig/ngr3_808_2.gif';
}
function ng3()
{
document.navig3.src='../img/navig/ng3_808_2.gif';
}