function ShowDiv(op) {
  document.getElementById('internet_renewal').style.display='none';
  document.getElementById('mobile_internet').style.display='none';
  document.getElementById('internet_everywhere').style.display='none';
  document.getElementById('fav_numbers').style.display='none';
  document.getElementById('prepaid').style.display='none';  
  document.getElementById('choicenumber').style.display='none';  
  document.getElementById('talknowplans').style.display='none';
  document.getElementById('manageprepaid').style.display='none';
  document.getElementById('rechargecards').style.display='none';
  document.getElementById('intcallrates').style.display='none';
  document.getElementById('orangezone').style.display='none';
  document.getElementById('messaging').style.display='none';
  document.getElementById('callme').style.display='none';
  document.getElementById('easyshare').style.display='none';
  document.getElementById('voicemail').style.display='none';
  document.getElementById('warranty').style.display='none';
  document.getElementById('stolen').style.display='none';  
  document.getElementById('simcardfaults').style.display='none';
  document.getElementById('scratchcardfaults').style.display='none';   
  document.getElementById('handsets').style.display='none';
   
 if (op == 1) {
    document.getElementById('internet_renewal').style.display="block";
  }
  if (op == 2) {
    document.getElementById('mobile_internet').style.display="block";
  }
  if (op == 3) {
    document.getElementById('internet_everywhere').style.display="block";
  }
  if (op == 4) {
    document.getElementById('fav_numbers').style.display="block";
  }
  if (op == 5) {
    document.getElementById('prepaid').style.display="block";
  }  
  if (op == 6) {
    document.getElementById('choicenumber').style.display="block";
  }
  if (op == 7) {
    document.getElementById('talknowplans').style.display="block";
  }  
  if (op == 8) {
    document.getElementById('manageprepaid').style.display="block";
  }
  if (op == 9) {
    document.getElementById('rechargecards').style.display="block";
  }
  if (op == 10) {
    document.getElementById('intcallrates').style.display="block";
  }
  if (op == 11) {
    document.getElementById('orangezone').style.display="block";
  }
  if (op == 12) {
    document.getElementById('messaging').style.display="block";
  }
   if (op == 13) {
    document.getElementById('callme').style.display="block";
  }
  if (op == 14) {
    document.getElementById('easyshare').style.display="block";
  }
  if (op == 15) {
    document.getElementById('voicemail').style.display="block";
  }
  if (op == 16) {
    document.getElementById('warranty').style.display="block";
  }
  if (op == 17) {
    document.getElementById('stolen').style.display="block";
  }
  if (op == 18) {
    document.getElementById('simcardfaults').style.display="block";
  }
  if (op == 19) {
    document.getElementById('scratchcardfaults').style.display="block";
  }
  if (op == 20) {
    document.getElementById('handsets').style.display="block";
  }
   
  
}