function compareCars()  
{
  var foundCount = 0;
  var carOne = "";
  var carTwo = "";
  
  rnodes = document.getElementsByName("cbCompare");
  nrows = rnodes.length;
  
  for ( i=0; i < nrows; i++ ) {
    //cb = document.getElementById('compareCheckBox'+i);
    cb = rnodes[i];
    //alert (cb.id+'/'+cb.checked+'/'+cb.value);
    if (cb.checked) {
      foundCount++;
      if (foundCount == 1) {
        carOne = cb.value;
      } else {
        carTwo = cb.value;
      }
    }
  }
  //alert (carOne+'/'+carTwo);
  
  if(carOne=="" || carTwo=="") return;
  
  gotoAddress = "/carCompare.asp?locator="+carOne+"&locatorb="+carTwo;
  location.href=gotoAddress;
}