//checkDate:
//Checks to make sure that the date is in mm/dd/yyyy format in
//a text field in a form.
//
//NOTE: There is NO RANGE CHECKING for the year. Users can legitimately enter
// 0001 for the date. Modify the reqular expression if you need to limit
// the year. There is a modicum of range checking for the month and date.
//
//You'll need to add:
//
//
//
// to the portion of your file (Make sure the library directory path is
// correct. You'l also need to add:
//
// onchange="checkDate(this);"
//
// to the tag in your form. Make sure that you deal with the double quotes
// correctly.
//
// TO-DOS:
// The .focus() call does not work as I want.
//
// -John Lutz 2001-08-09
//
function checkDate(theField)
{
var dateReg = /^[0-1]\d\/[0-3]\d\/\d\d\d\d$/;
if (! dateReg.exec(theField.value))
{
var alertStr = 'The date must be in mm/dd/yyyy format.';
alert(alertStr);
theField.focus();
return false;
}
return true;
}
function dayMath(theField, intDays)
{
if ( theField.value == '' ) {
theField.value = new Date();
}
var theDate = new Date();
theDate.setTime(Date.parse(theField.value));
var secs = theDate.getTime();
var offset = intDays * 1000 * 60 * 60 * 24;
theDate.setTime(secs + offset);
var theMonth = theDate.getMonth()+1; //Jan = 0
if (theMonth < 10)
{
theMonth = "0" +theMonth
}
var dateNum = theDate.getDate();
if (dateNum < 10)
{
dateNum = "0" +dateNum
}
var theYear = theDate.getFullYear();
theField.value = theMonth+ "/" +dateNum+ "/" +theYear;
return true;
}