function validate() {
 
  if (document.forsince.q1[0].checked != true) {
      alert("try again for 1");
      return false; 
}
  if (document.forsince.q2[1].checked != true) {
      alert("try again for 2");
     return false; 
    }
 
  if (document.forsince.q3[0].checked != true){
      alert("try again for 3");
      return false; 
}
       
 if (document.forsince.q4[0].checked != true) {
      alert("try again for 4");
      return false; 
}
  if (document.forsince.q5[1].checked != true) {
      alert("try again for 5");
     return false; 
    }
 
  if (document.forsince.q6[0].checked != true){
      alert("try again for 6");
      return false; 
}
       
 if (document.forsince.q7[0].checked != true) {
      alert("try again for 7");
      return false; 
}
  if (document.forsince.q8[1].checked != true) {
      alert("try again for 8");
     return false; 
    }
 
  if (document.forsince.q9[1].checked != true){
      alert("try again for 8");
      return false; 
}

  if (document.forsince.q10[0].checked != true){
      alert("try again for 10");
      return false; 
}
       
   alert("Good work. All your answers are correct.");
   return true;
}

function answers() {
    NewWin=window.open('answers.html','NewWin',
   'toolbar=no,status=no,width=200,height=360');
}