submitCount=0;
function submitOnce(){
  if (submitCount==0){submitCount++;return true}   
  else {return false}
}
function verifySignUp(obj) {
  var error="";
  var validemail=/([a-zA-Z0-9_'+*$%\^&!\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9:]{2,4})+$/;
  if (obj.firstname.value==""||obj.lastname.value==""){error+="\n- Enter your full name"}	
  if (obj.email.value==""){error+="\n- Enter your email address"}
  else if (validemail.test(obj.email.value)!=true){error+="\n- Enter your email address (that one isn't valid)"}
  if (error==""){return true}
  else {
	error="Before we can sign you up, please:\n"+error;
  	alert(error);
	return false;
  }
 }
 function clickBox(chkbox){
	thisBox=document.getElementById(chkbox);
	if(thisBox.checked==false){thisBox.checked=true}
	else{thisBox.checked=false}
 }