function validate()
{
// check if name entered
   if (document.form1.name.value == null || document.form1.name.value == "") 
   {
	   alert("Please enter your name");
	   return false;
	}
// check email field to contain one @ and no blanks
	var seenAt = false;
	var seenDot = false;
	for (var j = 0; j < document.form1.email.value.length; j++)
	{
	  var c = document.form1.email.value.charAt(j);
	  if ((c == ' ') || (c == '\n') || (c == '\t'))
	  {
	     alert("Please enter a valid email address");
	     return false;
	   }
	  if (c == '0' && (seenAt == true || seenDot == true))
	  {
	     alert("Please enter a valid email address");
	     return false;
	   }
	  if (c == '@') seenAt = true;
	  if (c == '.') seenDot = true;
	}
	if (seenAt == false || seenDot == false)
	{
	  alert("Please enter a valid email address");
	  return false;
	}
//check if city selected
	if(document.form1.city.selectedIndex==0)
	{
		alert("Please select a city to which you want to travel.");
		return false;
	}
return true;
}