function IsNumeric(sText)
{
var ValidChars = "0123456789.";
var IsNumber = true;
var Char;
var sawDot = false;
for (i = 0; i < sText.length && IsNumber == true; i++)
{
Char = sText.charAt(i);
if(Char == '.'){
if(sawDot)
return false
else
sawDot = true
}
if (ValidChars.indexOf(Char) == -1){
IsNumber = false;
}
}
return IsNumber;
}
// ********************************************************
// This function accepts a string variable and verifies if
// it is a proper date or not. It validates format
// matching either mm-dd-yyyy or mm/dd/yyyy. Then it checks
// to make sure the month has the proper number of days,
// based on which month it is.
// The function returns true if a valid date, false if not.
// ********************************************************
function isDate(dateStr) {
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)((\d{2})|(\d{4}))$/;
var matchArray = dateStr.match(datePat); // is format OK?
if (matchArray == null) {
return false;
}
// parse date into variables
month = matchArray[1];
day = matchArray[3];
year = matchArray[5];
if (month < 1 || month > 12) { // check month range
return false;
}
if (day < 1 || day > 31) {
return false;
}
if ((month==4 || month==6 || month==9 || month==11) && day==31) {
return false;
}
if (month == 2) { // check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day > 29 || (day==29 && !isleap)) {
return false;
}
}
return true; // date is valid
}
function replace(string,text,by) {
// Replaces text with by in string
var strLength = string.length, txtLength = text.length;
if ((strLength == 0) || (txtLength == 0)) return string;
var i = string.indexOf(text);
if ((!i) && (text != string.substring(0,txtLength))) return string;
if (i == -1) return string;
var newstr = string.substring(0,i) + by;
if (i+txtLength < strLength)
newstr += replace(string.substring(i+txtLength,strLength),text,by);
return newstr;
}
function isValidEmail(strEmail){
validRegExp = /^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$/i;
if(strEmail.search(validRegExp) == -1)
return false;
return true;
}
function getXmlHttp(){
var xmlhttp = false;
if(window.XMLHttpRequest){
xmlhttp = new XMLHttpRequest();
}
else if(window.ActiveXObject){
try{
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}catch(E){
xmlhttp = false;
}
}
}
return xmlhttp;
}