regular expression to validate website URL

RakhiKalra · Jun 2, 2004

Hi,

in one of my web form i need to validate a text box in which URL of site is entered.I need a regular expression for it.
the URL can not contain ftp ..it can contain http and https.
please help.

Rakhi Kalra

BillyRayPreachersSon · Jun 2, 2004

Why use a regular expression for that? Just do a simple string test (indexOf) for "http" being at position 0 in the string, surely?

Hope this helps,
Dan

kaht · Jun 2, 2004

This is a simple regex to do exactly what dan suggested, if you really must use regular expressions.

Code:

<HTML>
<HEAD>
<TITLE>Test</TITLE>
<SCRIPT LANGUAGE=JavaScript>

function regexpCheck(str) {
   if ((/^((http)|(https))(:\/\/)/).test(str)) {
      alert ("Legal website address");
   }
   else {
      alert ("String entered was not a website.");
   }
   blahForm.blahText.value = '';
   blahForm.blahText.focus();
}

</SCRIPT>

<BODY>
<FORM NAME="blahForm">
<INPUT TYPE=TEXT NAME=blahText><br>
<INPUT TYPE=BUTTON VALUE='URL Test' NAME=blahButton ONCLICK='javascript:regexpCheck(blahForm.blahText.value);'>
</FORM>
</BODY>
</HTML>

-kaht

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

regular expression to validate website URL

RakhiKalra

Programmer

BillyRayPreachersSon

Programmer

kaht

Programmer

Similar threads

Part and Inventory Search

Sponsor