function show2(whichLayer)
{
     if (document.getElementById)
     {
          // this is the way the standards work
          var style2 = document.getElementById(whichLayer).style;
          style2.display = style2.display? "":"block";
     }
     else if (document.all)
     {
          // this is the way old msie versions work
          var style2 = document.all[whichLayer].style;
          style2.display = style2.display? "":"block";
     }
     else if (document.layers)
     {
          // this is the way nn4 works
          var style2 = document.layers[whichLayer].style;
          style2.display = style2.display? "":"block";
     }
}

function show3(){
	if (document.landingpage_form.cc.checked==true){
		document.all.check.style.display="none";
		document.all.check2.style.display="block";
	}
	else {document.all.check.style.display="block";
		document.all.check2.style.display="none";
	}
}
function show4()
{
    
    var choice = theForm.subject[theForm.subject.selectedIndex].value;
    
    //hide everything first
    document.all.inv_1.style.display = 'none';
    document.all.inv_2.style.display = 'none';
    document.all.inv_3.style.display = 'none';
    document.all.inv_4.style.display = 'none';
    switch(choice)
    {
        case "login":
            document.all.inv_1.style.display = 'block';  
        break;
        case "broken":
            document.all.inv_2.style.display = 'block';
        break;
        case "billing":
            document.all.inv_3.style.display = 'block';
        break;
        case "cancel":
            document.all.inv_4.style.display = 'block';
        break;
        case "null":
            // nothing to do
        break;
    }
}