sfHover = function() {
        var sfEls = document.getElementById('nav').getElementsByTagName('LI');
        for (var i=0; i<sfEls.length; i++) {
                sfEls[i].onmouseover=function() {
                        this.className+=' sfhover';
                }
                sfEls[i].onmouseout=function() {
                        this.className=this.className.replace(new RegExp(' sfhover\\b'),'');
                }
        }
}
if (window.attachEvent) window.attachEvent('onload',sfHover);



function hide(num) {

 var form1 = document.getElementById("form1");
 var form2 = document.getElementById("form2");  



   if ( num==1 ) {
     if(form1.style.visibility=='visible') form1.style.visibility='hidden'; else form1.style.visibility='visible';   
   }
   
    
   if ( num==2 ) {
      if(form2.style.visibility=='visible') form2.style.visibility='hidden'; else form2.style.visibility='visible';   
   }
    

   if ( num==3 ) {
     if ( form1.style.visibility == 'visible') form1.style.visibility='hidden'; else form1.style.visibility='visible'; 
     if ( form2.style.visibility == 'visible') form2.style.visibility='hidden'; else form2.style.visibility='visible'; 
   }
   
/*    var form = document.getElementById('form'+num);
    if (form.style.visibility=='visible') form.style.visibility='hidden'
    else form.style.visibility='visible';      */

  
}