What’s going on? It says that “hover is not defined”, but in my jsFiddle, the code works fine:
<a href="#" onmouseover="hover(1);">click</a>
<div id="1"></div>
<script type="text/javscript">
function hover(x) {
var id = x;
var hoverBubble = document.getElementById(id);
hoverBubble.innerHTML = "hello";
}
</script>
That is misspelled. It should be
javascript