function mouseOver1()
{
document.getElementById("a1").src="images/main/train_over.gif"
}
function mouseOut1()
{
document.getElementById("a1").src="images/main/train_button.jpg"
}



function mouseOver2()
{
document.getElementById("b1").src="images/main/learn_over.gif"
}
function mouseOut2()
{
document.getElementById("b1").src="images/main/learn_button.jpg"
}


function mouseOver3()
{
document.getElementById("c1").src="images/main/connect_over.gif"
}
function mouseOut3()
{
document.getElementById("c1").src="images/main/connect_button.jpg"
}