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simplify regex
// create a Regular Expression to test the validity of our input
var re = /97(?:8|9)([ -])\d{1,5}\1\d{1,7}\1\d{1,6}\1\d$/;
var re = /[-\s\d]{10,17}/;
var OK = re.exec(t);
if (!OK) {
{{Messagebox|type=success|text=Note: for the bookmarklet to work, it all has to be on one line. The code above is presented on several lines for readability.}}
Want this bookmarklet? Drag this link to your browser bookmark bar: <html><a href="javascript: (function(){var t=window.getSelection?window.getSelection().toString():document.selection.createRange().text;var re=/97(?:8|9)([ -])\d{1,5}\1\d{1,7}\1s\d]{110,617}\1\d$/;var OK=re.exec(t);if(!OK){alert(t+" isn't a valid ISBN\n Please just select a 10 or 13 digit ISBN\ndashes and spaces are OK")}else{window.location="http://newburyport.mvlc.org/eg/opac/results?contains=contains;_special=1;qtype=identifier%7Cisbn;locg=1;pane=numeric;query="+t}})();">Search MLVC</a></html>
== Try it ==
