function HideAllCalc()
{
 document.getElementById('passform').style.display='none';
 document.getElementById('loginform').style.display='none';
 document.getElementById('registerform').style.display='none';
}

function ShowCalcId(calc,id)
{
 HideAllCalc();
 document.getElementById(calc).style.display='block';

 if (calc == 'loginform')
 {
 document.getElementById('passform').style.display='none';
 document.getElementById('loginform').style.display='block';
 document.getElementById('registerform').style.display='none';
 }

 if (calc == 'registerform')
 {
 document.getElementById('passform').style.display='none';
 document.getElementById('registerform').style.display='block';
 document.getElementById('loginform').style.display='none';
 }
 
if (calc == 'passform')
 {
 document.getElementById('passform').style.display='block';
 document.getElementById('registerform').style.display='none';
 document.getElementById('loginform').style.display='none';
 }

}