use variable in regexp

So I have a working regular expression that does what I want.  The problem is that I need to insert a variable into the regexp.  The code is attached.  How do I get the second code snippet to work.
WORKS
<script type="text/javascript">
  var re = /(\b)(glossary term)(?![^<]*>|[^<]*<\/a>)/g;
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>
 
DOES NOT WORK
<script type="text/javascript">
  var word="glossary term";
  var re = new RegExp("(\b)("+word+")(?![^<]*>|[^<]*<\/a>)","g");
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>

Open in new window

LVL 6
mattjp88Asked:
Who is Participating?
 
hieloConnect With a Mentor Commented:
This is what I tried:
<script type="text/javascript">
  var re = /(\b)(glossary term)(?![^<]*>|[^<]*<\/a>)/g;
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>
 
<script type="text/javascript">
  var word="glossary term";
  var re = new RegExp("(\\b)("+word+")(?![^<]*>|[^<]*<\\/a>)","g");
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>

Open in new window

0
 
hieloCommented:
Try:
var re = new RegExp("(\\b)("+word+")(?![^<]*>|[^<]*<\\/a>)","g");

Open in new window

0
 
mattjp88Author Commented:
no dice
0
Cloud Class® Course: Microsoft Exchange Server

The MCTS: Microsoft Exchange Server 2010 certification validates your skills in supporting the maintenance and administration of the Exchange servers in an enterprise environment. Learn everything you need to know with this course.

 
hieloCommented:
What part is not working. Both seem to be alerting the same value
0
 
mattjp88Author Commented:
in FF 3 it alerts 2 different values
<script type="text/javascript">
  var re = /(\b)(glossary term)(?![^<]*>|[^<]*<\/a>)/g;
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>
 
<script type="text/javascript">
  var word="glossary term";
  var re = new RegExp("(\b)("+word+")(?![^<]*>|[^<]*<\/a>)","g");
  var sourcestring = 'aglossary term <a href="page.aspx">glossary term</a> glossary term <test glossary term test> glossary term';
  var replacementpattern = '$1<a href="glossary.aspx#$2" title="def" class="glossary">$2</a>';
  var result = sourcestring.replace(re, replacementpattern);
  alert("result = " + result);
</script>

Open in new window

0
 
mattjp88Author Commented:
Don't know what I did before, but your code works.  Thanks!!
0
 
hieloCommented:
You are welcome!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.