jQuery add text to span within a div

Question

<div id="tagscloud">        <span></span> </div> 

How would I do to add some text within the span like code below ?

<span>**tag cloud**</span>

Edit: actually the span has an id

<div id="tagscloud"> <span id="WebPartCaptionWPQ2"></span> </div> 

Answer 1

You can use:

$("#tagscloud span").text("Your text here"); 

The same code will also work for the second case. You could also use:

$("#tagscloud #WebPartCaptionWPQ2").text("Your text here"); 

Answer 2

Careful - append() will append HTML, and you may run into cross-site-scripting problems if you use it all the time and a user makes you append('<script>alert("Hello")</script>').

Use text() to replace element content with text, or append(document.createTextNode(x)) to append a text node.