javascript - how to create script tag with a src from a var? -

hi need add create script tag var:

var m ="<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js'></script>" 

and need work example jquery link need work if write jquery code work. tried many codes such as:

m = m.replace(/<script src="|<script src='/g,""); m = m.replace(/"><\/script>|'><\/script>/g,""); var script = document.createelement('script'); script.src = m; document.getelementsbytagname('head')[0].appendchild(script); 

but nothing worked.

this full code : index.html code.html

try

var m ="<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js'></script>"; document.getelementsbytagname('head')[0].innerhtml = m; 

be warned not work when inserting tags in internet explorer.