//for checking the date --
function checkValidDate(dateStr) {
// dateStr must be of format month day year with either slashes
// or dashes separating the parts. Some minor changes would have
// to be made to use day month year or another format.
// This function returns True if the date is valid.
var slash1 = dateStr.indexOf("/");
if (slash1 == -1) { slash1 = dateStr.indexOf("-"); }
// if no slashes or dashes, invalid date
if (slash1 == -1) { return false; }
var dateMonth = dateStr.substring(0, slash1)
var dateMonthAndYear = dateStr.substring(slash1+1, dateStr.length);
var slash2 = dateMonthAndYear.indexOf("/");
if (slash2 == -1) { slash2 = dateMonthAndYear.indexOf("-"); }
// if not a second slash or dash, invalid date
if (slash2 == -1) { return false; }
var dateDay = dateMonthAndYear.substring(0, slash2);
var dateYear = dateMonthAndYear.substring(slash2+1, dateMonthAndYear.length);
if ( (dateMonth == "") || (dateDay == "") || (dateYear == "") ) { return false; }
// if any non-digits in the month, invalid date
for (var x=0; x < dateMonth.length; x++) {
var digit = dateMonth.substring(x, x+1);
if ((digit < "0") || (digit > "9")) { return false; }
}
// convert the text month to a number
var numMonth = 0;
for (var x=0; x < dateMonth.length; x++) {
digit = dateMonth.substring(x, x+1);
numMonth *= 10;
numMonth += parseInt(digit);
}
if ((numMonth <= 0) || (numMonth > 12)) { return false; }
// if any non-digits in the day, invalid date
for (var x=0; x < dateDay.length; x++) {
digit = dateDay.substring(x, x+1);
if ((digit < "0") || (digit > "9")) { return false; }
}
// convert the text day to a number
var numDay = 0;
for (var x=0; x < dateDay.length; x++) {
digit = dateDay.substring(x, x+1);
numDay *= 10;
numDay += parseInt(digit);
}
if ((numDay <= 0) || (numDay > 31)) { return false; }
// February can't be greater than 29 (leap year calculation comes later)
if ((numMonth == 2) && (numDay > 29)) { return false; }
// check for months with only 30 days
if ((numMonth == 4) || (numMonth == 6) || (numMonth == 9) || (numMonth == 11)) {
if (numDay > 30) { return false; }
}
// if any non-digits in the year, invalid date
for (var x=0; x < dateYear.length; x++) {
digit = dateYear.substring(x, x+1);
if ((digit < "0") || (digit > "9")) { return false; }
}
// convert the text year to a number
var numYear = 0;
for (var x=0; x < dateYear.length; x++) {
digit = dateYear.substring(x, x+1);
numYear *= 10;
numYear += parseInt(digit);
}
// Year must be a 2-digit year or a 4-digit year
if ( (dateYear.length != 2) && (dateYear.length != 4) ) { return false; }
// if 2-digit year, use 50 as a pivot date
if ( (numYear < 50) && (dateYear.length == 2) ) { numYear += 2000; }
if ( (numYear < 100) && (dateYear.length == 2) ) { numYear += 1900; }
if ((numYear <= 0) || (numYear > 9999)) { return false; }
// check for leap year if the month and day is Feb 29
if ((numMonth == 2) && (numDay == 29)) {
var div4 = numYear % 4;
var div100 = numYear % 100;
var div400 = numYear % 400;
// if not divisible by 4, then not a leap year so Feb 29 is invalid
if (div4 != 0) { return false; }
// at this point, year is divisible by 4. So if year is divisible by
// 100 and not 400, then it's not a leap year so Feb 29 is invalid
if ((div100 == 0) && (div400 != 0)) { return false; }
}
// date is valid
return true;
}

//-For trimming the input string
function trim(inputString) {
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

// JavaScript Document
//--Checkemail
	var testresults
	function checkemail(mail){
	var str=mail
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(str))
	testresults=true
	else{
	//alert("Please input a valid email address!")
	testresults=false
	}
	return (testresults)
	}
//---end checkemail