//<!--
// eliminate the left and right spaces from the string.
function Trim(string) {
	var i;
	var intCount;
	
	intCount = 0;
	for (i = 0; i < string.length; i++) 
		if ((string.charAt(i)) != " ") 
			break;
		else 
			intCount = intCount + 1;
		
	string = string.substring(intCount, string.length);
	
	intCount = 0;
	for (i = string.length-1; i >= 0; i--) 
		if ((string.charAt(i)) != " ") 
			break;
		else 
			intCount = intCount + 1;
		
	string = string.substring(0, string.length-intCount);	
	return string;		
}

//  Returns true if strNum  is a number
function isNumeric( strNum ) {
	var intCounter=0 , intLoop;

	strNum = Trim(strNum);
	if (strNum == '') return false; // Not number
	if (strNum == '.') return false; // Not number
	if (strNum == '-') return false; // Not number

	for (intLoop = 0; intLoop < strNum.length; intLoop++) { // One . only
		if (strNum.charAt(intLoop) == ".") intCounter++;
		if (intCounter > 1) return false;
	}
	
	intCounter=0;
	for (intLoop = 0; intLoop < strNum.length; intLoop++) { // One - only
		if (strNum.charAt(intLoop) == "-") intCounter++;
		if (intCounter > 1) return false;
	}

	for (intLoop = 0; intLoop < strNum.length; intLoop++) { // 0-9, . only
		if(intLoop == 0) {
			if (((strNum.charAt(intLoop) < "0") || (strNum.charAt(intLoop) > "9")) && 
				(strNum.charAt(intLoop) != ".") && (strNum.charAt(intLoop) != "-") )
				return false;
		}
		else {
			if (((strNum.charAt(intLoop) < "0") || (strNum.charAt(intLoop) > "9")) && 
				(strNum.charAt(intLoop) != ".") )
				return false;
		}
	}
	return true; // value is 0
}

//Returns client-side date
function writedate(){
	var now = new Date();
	var days = new Array(6);
	var months = new Array(11);
	var day = now.getDay();
	var dd = now.getDate();
	var mm = now.getMonth();
	var yy = now.getFullYear();
	var str;
	days[0] = "Monday, ";
	days[1] = "Tuesday, ";
	days[2] = "Wednesday, ";
	days[3] = "Thursday, ";
	days[4] = "Friday, ";
	days[5] = "Saturday, ";
	days[6] = "Sunday, "

	months[0] = "January ";
	months[1] = "February ";
	months[2] = "March ";
	months[3] = "April ";
	months[4] = "May ";
	months[5] = "June ";
	months[6] = "July ";
	months[7] = "August ";
	months[8] = "September ";
	months[9] = "October ";
	months[10] = "November ";
	months[11] = "December ";
	str = days[day-1] + months[mm] + dd + ", " + yy;
	document.write(str);
}

//  Returns true if strNum  is alphanumeric
function isAlphaNum( strNum ) {

	var intLoop, strUNum;
    
	strUNum= strNum.toUpperCase();
	for (intLoop = 0; intLoop < strUNum.length; intLoop++) { 
		if ((((strUNum.charAt(intLoop) < "A") || (strUNum.charAt(intLoop) > "Z")) &&
			 ((strUNum.charAt(intLoop) < "0") || (strUNum.charAt(intLoop) > "9")))
		      && (strUNum.charAt(intLoop) != " "))
			return false;
	}
	return true;
}

function emailCheck (emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)")
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]

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

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		  for (var i=1;i<=4;i++) {
		    if (IPArray[i]>255) {
		        alert("Destination IP address is invalid!")
			return false
		    }
	    }
	    return true
	}

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

	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) {
	   alert("The address must end in a three-letter domain, or two letter country.")
	   return false
	}

	if (len<2) {
	   var errStr="This address is missing a hostname!"
	   alert(errStr)
	   return false
	}

	return true;
}

//VALIDATE DATE
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

/*function ValidateForm(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
}*/

// -->

function isDatePDF(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
return true
}