// JavaScript Document
function validate_and_enter()
{
	var regname = /^[a-zA-Z ]+$/; //Allows only letters
	var email = /^[\w\.\-]+@([\w\-]+\.)+[a-zA-Z]+$/;
	var comments = /[<>&%$\[\]{}\"]/;
	var blank = "";
	var problem = false;
	
	//error messages
	
	var namenoentry = " You must enter a name.";
	var nameformat = " The name field can only contain letters.";
	var emailformat = " This is not a valid email format.";
	var commentnoentry = " You must enter a comment.";
	var commentformat = " Comments can only contain letters, numbers, periods."
	
	
	//name validation
    var regnameelement = document.getElementById('regname').value;
	 if (regnameelement == "")
			{
				document.getElementById('nameerror').innerHTML = namenoentry;
				problem = true;
			}
		
		else if(!regname.test(regnameelement))
			{
				document.getElementById('nameerror').innerHTML = nameformat;
				problem = true;
			}
		else
			{
				document.getElementById('nameerror').innerHTML = blank;
				
			}
		
	//email validation
	var emailelement = document.getElementById('email').value;
	
	//if (emailelement.value == "")
		//{
			//document.getElementById('emailerror').innerHTML = blank;
			
		//}
	
	if (emailelement !="")
		{
			if (!email.test(emailelement))
				{
					document.getElementById('emailerror').innerHTML = emailformat;
					problem = true;
				}
			else
				{
					document.getElementById('emailerror').innerHTML = blank;
					
				}
		}
	
			
	//comment validation
	var commentelement = document.getElementById('comment').value;
		if (commentelement== "")
			{
				document.getElementById('commenterror').innerHTML = commentnoentry;
				problem = true;
			}
		
		else if(comments.test(commentelement))
			{
				document.getElementById('commenterror').innerHTML = commentformat;
				problem = true;
			}
		else
			{
				document.getElementById('commenterror').innerHTML = blank;
				
			}
			
	
	if (problem == false)
		{
							
				var regname = document.getElementById("regname").value;
				var email = document.getElementById("email").value;
				var comment = document.getElementById("comment").value;
				var url = "../guestbook/connections/guestbookproc.php"
				
				request.open("POST", url, true);
			  request.onreadystatechange = showConfirmation;
			  request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
				request.send("regname=" + escape(regname) +
								"&email=" + escape(email) +
								"&comment=" + escape(comment)); 
		}
	
}

function showConfirmation() {
  if (request.readyState == 4) {
    if (request.status == 200) {
      var response = request.responseText;
      document.getElementById("entries").innerHTML = response;
	 document.forms["form1"]["regname"].value = "";
      document.forms["form1"]["email"].value = "";
	 document.forms["form1"]["comment"].value ="";
	 
    } else {
      var message = request.getResponseHeader("Status");
      if ((message == null) || (message.length <= 0)) {
        alert("Error! Request status is " + request.status);
      } else {
        alert(message);
      }
    }
  }
}