function validate_required(field,alerttxt)
{
with (field)
{
  if (value==null||value=="")
    {alert(alerttxt);return false;}
  else
    {return true;}
}
}

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@");
dotpos=value.lastIndexOf(".");
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false;}
else {return true;}
}
}

function validate_form(thisform)
{
with (thisform)
{
if (validate_required(First_Name,"First name must be filled out!")==false)
  {First_Name.focus();return false;}
else if (validate_required(Last_Name,"Last name must be filled out!")==false)
  {Last_Name.focus();return false;}
else if (validate_email(Email,"Email must be filled out!")==false)
  {Email.focus();return false;}
else if (validate_required(Comments,"Comments must be filled out!")==false)
  {Comments.focus();return false;}
else
  {return true;}
}
}