function emailcheck(cur)
{
var string1=cur.email.value
if ((string1.indexOf("@")==-1) ||
   (string1.indexOf(".")==-1))
{
alert("Please input a valid email address!")
return false
}
}
	
  function emailcheckstudent(cur)
  {
	var string1=cur.studentemail.value;
	var string2=cur.senderemail.value;
	if ((string1.indexOf("@")==-1) || (string1.indexOf(".")==-1) || (string2.indexOf("@")==-1) || (string2.indexOf(".")==-1)) 
	{
	alert("Please input a valid email address!");
	return false
	}
  }
	
  function emailcheck2(cur)
  {
	var string1=cur.email.value;
	if (string1.indexOf("@")==-1)
	{
	alert("Please input a valid email address!");
	return false
	}
  }
	
  function enforcechar(what,limit)
  {
	if (what.value.length>=limit)
	return false
  }