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

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(myname,"Your name must be filled out.")==false)
  {myname.focus();return false;}
  if (validate_email(myemail,"Not a valid e-mail address.")==false)
  {myemail.focus();return false;}
  if (validate_required(mynumber,"Your phone number must be filled out.")==false)
  {mynumber.focus();return false;}
  if (validate_required(weddingdate,"Your wedding date must be filled out.")==false)
  {weddingdate.focus();return false;}
  if (validate_required(venue,"Your venue must be filled out.")==false)
  {venue.focus();return false;}
  if (validate_required(hear,"You must be fill out how you heard about us.")==false)
  {hear.focus();return false;}
  }
}