JavaScript Undefined Error

I keep getting "chkName" is undefined.
I also get error expected ")"

I have a userinfo.js file along with this.
Can someone  help me figure out why i am getting undefined errors.
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml11.dtd">
 
<!-- userinfo.html    a document for userinfo.js
        -->
 
<html xmlns = "http://www.w3.org/1999/xhtml">
   <head>
      <title> Illustrates form Input Validation </title>
      <script type = "text/javascript" src = "userinfo.js" >
      </script>
   </head>
   <body>
   <h3> Customer Information </h3>
   <form action = "">
 
   	<p>
   		<label>
   			<input type = "text" id = "custName" />
   			Name (last name, first name, middle initial)
   		</label>
   		<br /><br />
 
   		<label>
   			<input type = "text" id = "phone" />
   			Phone number (ddd-ddd-dddd)
   		</label>
   		<br /><br />
 
   		<input type = "reset" id = "reset" />
 
   		<input type = "submit" id = "submit" />
   	</p>
   </form>
 
   <!-- An inline script for the event handler registrations -->
   		<script type = "text/javascript">
   		   <!--
   // Set form element object properties to their
   // corresponding event handler functions
 
 
   		document.getElementById("custName").onchange = chkName;
   		document.getElementById("phone").onchange = chkPhone;
   // -->
 
    </script>
 
   </body>
</html>
 
 
 
// userinfo.js
// an example of input validation using the change and submit events
 
// The event handler function for the name text box
 
function chkName() {
	var myName = document.getElementById("custName");
	
	// Test the format of the input name
	// Allow the spaces after the commas to be optional
	// Allow the period after the inital to be optional
		var pos = myName.value.search(
			/^[A-Z][a-z]+, ?[A-Z][a-z]+, ?[A-Z]\.?$/);
		if (pos != 0) {
			alert("The name you entered (" + myName.value +
				") is not in the correct form. \n" +
				"The correct form is: " +
				"last-name, first-name, middle-intial \n" +
				"Please go back and fix your name");
		myName.focus();
		myName.select();
		return false;
		} else
		  return true;
	}
	
	// The event handler function for the phone number text box
	
	function chkPhone() {
		var myPhone = document.getElementById("phone");
		
		// Test the format of the input phone number
			var pos = myPhone.value.search(/^\d{3}-\d{3}-\d{4}$/);
			if (pos != 0) {
				alert("The phone number you entered (" + myPhone.value +
				") is not in the correct form. \n" +
				"The correct form is" ddd-ddd-dddd \n" +
				"Please go back and fix your phone number");
		myPhone.focus();
		myPhone.select();
		return false;
	} else
	  return true;
}

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ChadAnglinAsked:
Who is Participating?
 
mr_egyptianCommented:
Change to the following starting on line 89  above.  You have a stray double quote.
alert("The phone number you entered (" + myPhone.value +
") is not in the correct form. \n" +
"The correct form is ddd-ddd-dddd \n" +
"Please go back and fix your phone number");

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