function buttonGoOver(id)
{
	id.style.backgroundImage  = "url(/images/button_go_over.png)";
}
function buttonGoOut(id)
{
	id.style.backgroundImage  = "url(/images/button_go_up.png)";
}


function buttonClearOver(id)
{
	id.style.backgroundImage  = "url(/images/button_clear_over.png)";
}
function buttonClearOut(id)
{
	id.style.backgroundImage  = "url(/images/button_clear_up.png)";
}