function unHider()
{
document.all.div1.style.display = 'block';
document.all.div2.style.display = 'none';
document.forms[0].R2[1].checked = true
}
function hider()
{
document.all.div1.style.display = 'none';
document.all.div2.style.display = 'block';
document.forms[0].R1[0].checked = true
}