var dtCh= "/";

function SetLostFocus(objectid)
{
	//alert('SetLostFocus: ' + objectid);
	var objFocus = document.getElementById(objectid);
	if (objFocus) {
		//alert('Khac NULL');
		objFocus.blur();
	}
}

function ConvertDMY2MDY(strDMYDate)
{
	var dArray;
	var d, m, y;
	
	dArray = strDMYDate.split("/");
	d = parseInt(dArray[0], 10);
    m = parseInt(dArray[1], 10);
    y = parseInt(dArray[2], 10);
    
    var a = m + "/" + d + "/" + y;
    //alert(a);
    return a;
}

function CompareDate(dtStr1, dtStr2)	// dtStr1 is depart date, dtStr2 is return date
{
	//alert('CompareDate called.');
	//alert('dtCh = ' + dtCh);
	var pos1_1 = dtStr1.indexOf(dtCh);
	//alert('pos1_1 = ' + pos1_1);
	var pos1_2 = dtStr1.indexOf(dtCh,pos1_1+1);
	//alert('pos1_2 = ' + pos1_2);
	
	var strMonth1 = dtStr1.substring(0,pos1_1);
	if (strMonth1.charAt(0)=="0" && strMonth1.length>1)
		strMonth1 = strMonth1.substring(1);
	//alert('strMonth1 = ' + strMonth1);
		
	var strDay1 = dtStr1.substring(pos1_1+1,pos1_2);
	if (strDay1.charAt(0) == "0" && strDay1.length>1)
		strDay1 = strDay1.substring(1);
	//alert('strDay1 = ' + strDay1);
		
	var strYear1 = dtStr1.substring(pos1_2+1);
	for (var i = 1; i <= 3; i++) {
		if (strYear1.charAt(0) == "0" && strYear1.length>1) 
			strYear1 = strYear1.substring(1);
	}
	//alert('strYear1 = ' + strYear1);
	
	var month1 = parseInt(strMonth1);
	//alert('month1 = ' + month1);
	var day1 = parseInt(strDay1);
	//alert('day1 = ' + day1);
	var year1 = parseInt(strYear1);
	//alert('year1 = ' + year1);
	
	var pos2_1 = dtStr2.indexOf(dtCh);
	//alert('pos2_1 = ' + pos2_1);
	var pos2_2 = dtStr2.indexOf(dtCh,pos2_1+1);
	//alert('pos2_2 = ' + pos2_2);
	
	var strMonth2 = dtStr2.substring(0,pos2_1);
	if (strMonth2.charAt(0)=="0" && strMonth2.length>1)
		strMonth2 = strMonth2.substring(1);
	//alert('strMonth2 = ' + strMonth2);
		
	var strDay2 = dtStr2.substring(pos2_1+1,pos2_2);
	if (strDay2.charAt(0) == "0" && strDay2.length>1)
		strDay2 = strDay2.substring(1);
	//alert('strDay2 = ' + strDay2);
		
	var strYear2 = dtStr2.substring(pos2_2+1);
	for (var i = 1; i <= 3; i++) {
		if (strYear2.charAt(0) == "0" && strYear2.length>1) 
			strYear2 = strYear2.substring(1);
	}
	//alert('strYear2 = ' + strYear2);
	
	var month2 = parseInt(strMonth2);
	var day2 = parseInt(strDay2);
	var year2 = parseInt(strYear2);
	
	if (year1 > year2)
		return false;
	if (year1 < year2)
		return true;
	
	if (month1 > month2)
		return false;
	if (month1 < month2)
		return true;
	
	if (day1 > day2)
		return false;
	return true;
}

function trim(inputString) 
{
	// Removes leading and trailing spaces from the passed string. Also removes
	// consecutive spaces and replaces it with one space. If something besides
	// a string is passed in (null, custom object, etc.) then return the input.
	if (typeof inputString != "string") { return inputString; }
	
	var retValue = inputString;
	var ch = retValue.substring(0, 1);
		
	while (ch == " ") { 
		// Check for spaces at the beginning of the string
		retValue = retValue.substring(1, retValue.length);
		ch = retValue.substring(0, 1)
	}
	
	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ") { 
		// Check for spaces at the end of the string
		retValue = retValue.substring(0, retValue.length-1);
		ch = retValue.substring(retValue.length-1, retValue.length);
	}
	
	while (retValue.indexOf("  ") != -1) {
		// Note that there are two spaces in the string - look for multiple spaces within the string
		retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
		// Again, there are two spaces in each of the strings
	}
	
	return retValue; // Return the trimmed string back to the user
} // Ends the "trim" function

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;
}