Get this error

error: error parsing attribute name

for this html line code:

<input type="button" class="px10" value="Steg 3: Ange Noter" onclick="location.href=\'#installningar\'" onMouseover="ddrivetip(\'testing.\')";onMouseout="hideddrivetip()"/>

The \ are for php parsing...

The semi-colon before the onMouseout is to blame I suspect.