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copied!<p>Typically, you would get the xmlhttp request response as pure Javascript and then use the Javascript eval() function:</p> <pre><code>function callback() { var result = xmlHttp.responseText; eval(result); } </code></pre> <p>In this case, you would NOT treat it as HTML. Instead, you would return pure code. The difference:</p> <p><strong>Don't do this in your page you call</strong></p> <pre><code><script type="text/javascript"> alert('xmlhttprequest loaded!'); </script> </code></pre> <p><strong>Do this instead</strong></p> <pre><code>alert('xmlhttprequest loaded!'); </code></pre> <p>So that, in effect this is what happens:</p> <pre><code>function callback() { var result = xmlHttp.responseText; eval("alert('xmlhttprequest loaded!');"); } </code></pre> <p>But you don't want this to happen:</p> <pre><code>function callback() { var result = xmlHttp.responseText; eval("<script>alert('xmlhttprequest loaded!');</script>"); } </code></pre> <p>There are some issues associated with doing it this way, such as eval can be slow. Google javascript eval to see what others have to say.</p> <p>=== EDIT ===</p> <p>Using a DOM method as opposed to xmlhttprequest may actually be what the original poster is needing to do here, which is load a Google captcha code dynamically.</p> <pre><code><html> <head></head> <body> <script type="text/javascript"> var head = document.getElementsByTagName('head')[0]; var script = document.createElement('script'); script.type = 'text/javascript'; script.src = "http://google.com/captcha/location"; head.appendChild(script); </script> </body> </html> </code></pre> <p>Additionally, if you need it to land somewhere, you can do something like:</p> <pre><code><html> <head></head> <body> <div id="captcha"> </div> <script type="text/javascript"> var captcha = document.getElementById('captcha'); var script = document.createElement('script'); script.type = 'text/javascript'; script.src = "http://google.com/captcha/location"; captcha.appendChild(script); </script> </body> </html> </code></pre>

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