javascript - Span tag onclick loads blank page? -

i've got span tag:

<span id="mybtnfb"     class="demo" onclick="open()">     <span class="icon">&nbsp;</span>     <span class="">testing</span> </span>

and javascript

  function open() {       alert('hello');   }

now, want happen when span clicked, fires function "open". seems happen though reloads page brings blank page. ideas?

open() native javascript function, opens new page (in case blank since there's no params specified): http://www.w3schools.com/jsref/met_win_open.asp

just rename function openalert(): http://jsfiddle.net/qtf5s/2/.

also, @ian mentioned in comments in jsfiddle, it's best change javascript wrap "no wrap - in " code works.

KHS