//Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com)
	/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
	            (the bug is actually in the weak regexp engine of the browser; I
	            simplified the regexps to make it work).
	   1.1.1: Removed restriction that countries must be preceded by a domain,
	            so abc@host.uk is now legal.  However, there's still the 
	            restriction that an address must end in a two or three letter
	            word.
	     1.1: Rewrote most of the function to conform more closely to RFC 822.
	     1.0: Original  */

	//This script and many more are available free online at The JavaScript Source!! http://javascript.internet.com
	//Begin
	function emailCheck (emailStr) {
		/* The following pattern is used to check if the entered e-mail address
		   fits the user@domain format.  It also is used to separate the username
		   from the domain. */
		var emailPat=/^(.+)@(.+)$/
		/* The following string represents the pattern for matching all special
		   characters.  We don't want to allow special characters in the address. 
		   These characters include ( ) < > @ , ; : \ " . [ ]    */
		var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
		/* The following string represents the range of characters allowed in a 
		   username or domainname.  It really states which chars aren't allowed. */
		var validChars="\[^\\s" + specialChars + "\]"
		/* The following pattern applies if the "user" is a quoted string (in
		   which case, there are no rules about which characters are allowed
		   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
		   is a legal e-mail address. */
		var quotedUser="(\"[^\"]*\")"
		/* The following pattern applies for domains that are IP addresses,
		   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
		   e-mail address. NOTE: The square brackets are required. */
		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
		/* The following string represents an atom (basically a series of
		   non-special characters.) */
		var atom=validChars + '+'
		/* The following string represents one word in the typical username.
		   For example, in john.doe@somewhere.com, john and doe are words.
		   Basically, a word is either an atom or quoted string. */
		var word="(" + atom + "|" + quotedUser + ")"
		// The following pattern describes the structure of the user
		var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
		/* The following pattern describes the structure of a normal symbolic
		   domain, as opposed to ipDomainPat, shown above. */
		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


		/* Finally, let's start trying to figure out if the supplied address is
		   valid. */

		/* Begin with the coarse pattern to simply break up user@domain into
		   different pieces that are easy to analyze. */
		var matchArray=emailStr.match(emailPat)
		if (matchArray==null) {
		  /* Too many/few @'s or something; basically, this address doesn't
		     even fit the general mould of a valid e-mail address. */
			alert("Email address seems incorrect (check @ and .'s)")
			return false
		}
		var user=matchArray[1]
		var domain=matchArray[2]

		// See if "user" is valid 
		if (user.match(userPat)==null) {
		    // user is not valid
		    alert("The username doesn't seem to be valid.")
		    return false
		}

		/* if the e-mail address is at an IP address (as opposed to a symbolic
		   host name) make sure the IP address is valid. */
		var IPArray=domain.match(ipDomainPat)
		if (IPArray!=null) {
		    // this is an IP address
			  for (var i=1;i<=4;i++) {
			    if (IPArray[i]>255) {
			        alert("Destination IP address is invalid!")
				return false
			    }
		    }
		    return true
		}

		// Domain is symbolic name
		var domainArray=domain.match(domainPat)
		if (domainArray==null) {
			alert("The domain name doesn't seem to be valid.")
		    return false
		}

		/* domain name seems valid, but now make sure that it ends in a
		   three-letter word (like com, edu, gov) or a two-letter word,
		   representing country (uk, nl), and that there's a hostname preceding 
		   the domain or country. */

		/* Now we need to break up the domain to get a count of how many atoms
		   it consists of. */
		var atomPat=new RegExp(atom,"g")
		var domArr=domain.match(atomPat)
		var len=domArr.length
		if (domArr[domArr.length-1].length<2 || 
		    domArr[domArr.length-1].length>3) {
		   // the address must end in a two letter or three letter word.
		   alert("The address must end in a three-letter domain, or two letter country.")
		   return false
		}

		// Make sure there's a host name preceding the domain.
		if (len<2) {
		   var errStr="This address is missing a hostname!"
		   alert(errStr)
		   return false
		}

		// If we've gotten this far, everything's valid!
		return true;
	}
	//  End

	function confirmCancel(){
		var bolSelection = confirm('Navigating away from this page will cause all your data will be lost.\n\nAre you sure you want to cancel?');

		if(bolSelection == true){
			window.location='index.php';
		}
	}

	function confirmAdminCancel(){
		var bolSelection = confirm('Navigating away from this page will cause all your data will be lost.\n\nAre you sure you want to cancel?');

		if(bolSelection == true){
			window.location='maintain.php';
		}
	}

	function IsNumeric(sText){
		var ValidChars = "0123456789";
		var IsNumber=true;
		var Char;

		for (i = 0; i < sText.length && IsNumber == true; i++){ 
			Char = sText.charAt(i); 
			if (ValidChars.indexOf(Char) == -1){
				IsNumber = false;
			}
		}
		return IsNumber;
	}


	function checkForm(strFormName) {
//		if(!checkRequired(document.forms[strFormName])) {
		if(!checkRequired(strFormName)) {
			if(document.all) {
				document.all.displayMessage.innerText = 'Please fill in all required fields.';
			} else {
				document.getElementById('displayMessage').innerHTML = 'Please fill in all required fields.';
			}
//			alert("Please fill in all required fields.");
			return false;
		} else {
			if(document.all) {
				document.all.displayMessage.innerText = '<br><br>';
			} else {
				document.getElementById('displayMessage').innerHTML = '<br><br>';
			}

//			document.forms[strFormName].submit();  
//			alert("OK");
			return true;
		}
	} 

	function checkRequired(frmData) {
		var bFail;
		bFail = false; // Default to pass

		for(iElement = 0; iElement < frmData.elements.length; iElement++) {
			if(frmData.elements[iElement].className == 'requiredInputField' || frmData.elements[iElement].className == 'missingInfoField') {
				if(frmData.elements[iElement].value == '') {
					bFail = true;
					frmData.elements[iElement].className = 'missingInfoField';
				} else {
					frmData.elements[iElement].className = 'requiredInputField';
				}
			}
		}
		return !bFail;
	}