// Javascript Form Validation

//Validate full form
function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(name,"Enter your name!")==false)
    {name.focus();return false;}
  if (validate_aberemail(email,"Not a valid e-mail address!")==false)
    {email.focus();return false;}
  if (validate_colours(colour,colour2,"Please make sure your colours are selected and different")==false)
    {colour.focus();return false;}
  if (validate_required(printname,"Enter your Print Name")==false)
    {printname.focus();return false;}
  }
alert("end of validate function");  
}

// Part 1, check all forms filled in
function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}
// Part 2, Check valid email
function validate_aberemail(field,alerttxt)
{
with (field)
  {
  apos=value.indexOf("@");
  dotpos=value.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {alert(alerttxt);return false;}
  else 
  {
  aberchr=value.indexOf("aber.ac.uk");
  if (aberchr !== -1) {
  return true;
  }
  else
  {
  return false;
  }
  }
}

//Part2, Check colours not equal
function validate_colours(field1,field2,alerttxt)
{
	alert ("colour");
if (field1 == field2)
{
alert (alerttxt);return false;
}
else
{
return true;
}
}
}