<!--
function checksearch()
	{
	var errormessage = "";
	var theSearch = document.getElementById('searchReg');
	theSearch.style.backgroundColor="";
	theSearch.style.color="";
	// check for null value
	if (theSearch.value == "")
		{
		window.alert("Please enter one or more characters/numbers of the registration number to search");
		theSearch.style.backgroundColor="blue";
		theSearch.style.color="white";
		return false;
		}
	// check for bad characters
	var itsvalue = theSearch.value;
	for(var j=0; j<itsvalue.length; j++)
		{
		  var theCharacter = itsvalue.charAt(j);
		  var hh = theCharacter.charCodeAt(0);
		  if((hh > 47 && hh<58) || (hh > 64 && hh<91) || (hh > 96 && hh<123) || (hh == 32))
			  {
			  }
			  else	{
			  window.alert("Please enter only letters,\nnumbers [and a space - if required] to search for reg number");
			  theSearch.style.backgroundColor="blue";
			  theSearch.style.color="white";
			  return false;
			  }
		}
	return true;
	}
-->