/*
JavaScript Bible, Fourth Edition
by Danny Goodman
John Wiley & Sons CopyRight 2001
*/
<HTML>
<HEAD>
<TITLE>Got a Match?</TITLE>
<SCRIPT LANGUAGE="JavaScript1.2">
function extractIt(form) {
var months = ["January","February","March","April","May","June","July",
"August","September","October","November","December"]
var days = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]
var re = /\b(1[0-2]|0?[1-9])[\-\/](0?[1-9]|[12][0-9]|3[01])[\-\/]((19|20)\d{2})/
var input = form.entry.value
var matchArray = re.exec(input)
if (matchArray) {
var theMonth = months[matchArray[1] - 1] + " "
var theDate = matchArray[2] + ", "
var theYear = matchArray[3]
var dateObj = new Date(matchArray[3],matchArray[1]-1,matchArray[2])
var theDay = days[dateObj.getDay()] + " "
form.output.value = theDay + theMonth + theDate + theYear
} else {
form.output.value = "An invalid date."
}
}
</SCRIPT>
</HEAD>
<BODY>
<B>Use a regular expression to extract data from a string:</B>
<HR>
<FORM>
Enter a date in the format mm/dd/yyyy or mm-dd-yyyy:<BR>
<INPUT TYPE="text" NAME="entry" SIZE=12><P>
<INPUT TYPE="button" VALUE="Extract Date Components" onClick="extractIt(this.form)"><P>
The date you entered was:<BR>
<INPUT TYPE="text" NAME="output" SIZE=40><P>
<INPUT TYPE="reset">
</FORM>
</BODY>
</HTML>
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