function mouseOver()
{
document.b1.src ="img/kotly1.gif"
}
function mouseOut()
{
document.b1.src ="img/kotly2.gif"
}

function mouseOver1()
{
document.b2.src ="img/kotly_kondens1.gif"
}
function mouseOut1()
{
document.b2.src ="img/kotly_kondens2.gif"
}

function mouseOver2()
{
document.b3.src ="img/kolektory1.gif"
}
function mouseOut2()
{
document.b3.src ="img/kolektory2.gif"
}

function mouseOver3()
{
document.b4.src ="img/pompy1.gif"
}
function mouseOut3()
{
document.b4.src ="img/pompy2.gif"
}

function mouseOver4()
{
document.b5.src ="img/kotly_stale1.gif"
}
function mouseOut4()
{
document.b5.src ="img/kotly_stale2.gif"
}

function mouseOver5()
{
document.b6.src ="img/wentylacja1.gif"
}
function mouseOut5()
{
document.b6.src ="img/wentylacja2.gif"
}

function mouseOver6()
{
document.b7.src ="img/nagrzewnice1.gif"
}
function mouseOut6()
{
document.b7.src ="img/nagrzewnice2.gif"
}

function mouseOver7()
{
document.b8.src ="img/kominki1.gif"
}
function mouseOut7()
{
document.b8.src ="img/kominki2.gif"
}

function mouseOver8()
{
document.b9.src ="img/garaze1.gif"
}
function mouseOut8()
{
document.b9.src ="img/garaze2.gif"
}

function mouseOver9()
{
document.b10.src ="img/inne1.gif"
}
function mouseOut9()
{
document.b10.src ="img/inne2.gif"
}
function mouseOver10()
{
document.b11.src ="img/promocje2.gif"
}
function mouseOut10()
{
document.b11.src ="img/promocje1.gif"
}