function swapform(i)
{

document.getElementById('form1').style.visibility="hidden";
document.getElementById('form1').style.display="none";

document.getElementById('form2').style.visibility="hidden";
document.getElementById('form2').style.display="none";

document.getElementById('form3').style.visibility="hidden";
document.getElementById('form3').style.display="none";

document.getElementById('form4').style.visibility="hidden";
document.getElementById('form4').style.display="none";

document.getElementById('form'+i).style.visibility="visible";
document.getElementById('form'+i).style.display="inline";
}