function noNumbers(e)
{
	var keynum;
	var keychar;
	var numcheck;
	
	if (window.event) {
		// IE
		keynum = e.keyCode
	}
	else if(e.which) {
		// Netscape/Firefox/Opera
		keynum = e.which
	}
	keychar = String.fromCharCode(keynum);
	numcheck = /\d/;
	return !numcheck.test(keychar);
}



function onlyNumbers(e)
{
	var iKeyCode, strKey;
	//regular expression, \d, matches only numeric characters (0-9).
	var reValidChars = /\d/;
	var isValid = true;
	if (window.event) {
		// IE
		iKeyCode = e.keyCode
	}
	else if(e.which) {
		// Netscape/Firefox/Opera
		iKeyCode = e.which
	}
	//alert(iKeyCode);
	strKey = String.fromCharCode(iKeyCode);
	if (!reValidChars.test(strKey) && !(iKeyCode == null || iKeyCode == 0 || iKeyCode == 8 || iKeyCode == 9 || iKeyCode == 13 || iKeyCode == 27)) {
    	//Invalid Character Detected!
		isValid = false;
    }
	return isValid;
}
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) {
    // Valid date format: mm/dd/yyyy

    var dtCh = "/"; // Valid date character
    var minYear = 1900;
    var maxYear = 2100;

    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
}
*/