function trimBlank( str )
{
    var p = /^\s*(.*?)\s*$/;
    var m = p.exec(str);
    return m[1];
}

function isNumber ( strValue )
{
 if ( strValue != null )
 {
  strValue = trimBlank ( strValue );
  if ( strValue != "" )
  {
   if ( isNaN (strValue) )
   {
    return false;
   }
   else
   {
    return true;
   }
  }
  else
  {
   return false;
  }
 }
 else
 {
  return false;
 }
}

function isValidKeyword()
{
	var strValue = document.getElementById("expCode").value;

	strValue = trimBlank (strValue);

	if ( strValue == "" || strValue == "search keyword" )
	{
		alert("Please Enter Title or CRN to search.");
		return false;
	}

	document.getElementById('homekeyword').style.display = 'none';
	document.getElementById('searchSpinner2').style.display = 'block';
	return true;
}

function isValidDivision()
{
	var strValue = document.getElementById("divisionSelect").value;

	strValue = trimBlank (strValue);

	if ( strValue == "%")
	{
		alert("Please Choose a division.");
		return false;
	}

	document.getElementById('homesemester').style.display = 'none';
	document.getElementById('searchSpinner3').style.display = 'block';

	return true;
}