//declare vars
var newSubject = null;
var newField = null;

var badchar  = new Array('!','#','$','%','^','&','*','(',')','[',']','{','}',':',';','\'','"','\\','/','>','<',',','?','`','~','+','=',' ','|');
var badchar2 = new Array('!','#','$','%','^','&','*','(',')','[',']','{','}',':',';','\'','"','\\','/','>','<',',','?','`','~','+','=',' ','|','-','_','.');

function doLast(form,email) {
  tmpfield = '';
  if (form.elements[email].value.indexOf('tmp')) tmpfield = newField;
  if (email == 'email') tmpfield = 'email';
  alert("Please enter a valid response for the following field:\n\n" + tmpfield);
  eval("form." + email +".focus();");
  return false;
}
  

function checkEmail(form,email) {
  newval = eval("form." + email + ".value");
  newlen = newval.length;

  if (newlen <= 0)
    return doLast(form,email);

  //is email more than 128 chars?
  if (newlen > 128)
    return doLast(form,email);

  //does '@' and '.' exist?
  if (newval.indexOf('@') <= 0 || newval.indexOf('.') <= 0)
    return doLast(form,email);

  //is there any bad chars?
  for (x=0; x<badchar.length; x++) {
    newchar = badchar[x];
    if (newval.indexOf(newchar) >= 0)
      return doLast(form,email);
  }
  
  //is there more than one '@'?
  tmp = newval.split('@');
  if (tmp.length > 2) 
    return doLast(form,email);

  //is there any bad chars around '@' or as last char or as first char?
  tmp1 = newval.indexOf('@');
  tmp2 = newval.substring(tmp1-1,tmp1+2);
  for (x=0; x<badchar2.length; x++) {
    newchar = badchar2[x];
    if (newval.charAt(0) == newchar)
      return doLast(form,email);
    if (tmp2.indexOf(newchar) >= 0)
      return doLast(form,email);
    if (newval.charAt(newlen-1) == newchar)
      return doLast(form,email);
  }

  //is there any bad chars around the last '.'?
  tmp = newval.split('@');
  second = tmp[1];
  third = second.split('.');
  tlen = third.length;
  newindex = third.length - 1;
  for (x=0; x<badchar2.length; x++) {
    newchar = badchar2[x];
    if (third[newindex].charAt(0) == newchar || third[newindex-1].charAt(third[newindex-1].length-1) == newchar || third[newindex-1].charAt(third[newindex-1].length-1) == "")
      return doLast(form,email);
  }

  //does this exist '..' ?
  tmp = newval.split('..');
  if (tmp.length > 1)
    return doLast(form,email);
	
  return true
}

function checkTmp(form) {
  l = form.elements.length;
  for (x=0; x<l; x++) {
    if (form.elements[x].name.indexOf('tmp') >= 0) {
	  newField = form.elements[x].name.substring(4,form.elements[x].name.length)
	  if (form.elements[x].value.length > 0) {
		newSubject = form.elements[x].value;
		form.elements['subject'].value = newField + ":" + newSubject;
		return true
      }
	}
  }
  return doLast(form,'tmp_' + newField);
}

function validateForm(form) { 
  isDone = checkEmail(form,'email')
  
  if (isDone)
    isDone = checkTmp(form)

  return isDone
}