$installer->preUpgrade();
$this->addHTML(
'<div id="config-spinner" style="display:none;"><img src="../skins/common/images/ajax-loader.gif" /></div>' .
- '<script>jQuery( "#config-spinner" )[0].style.display = "block";</script>' .
+ '<script>jQuery( "#config-spinner" ).show();</script>' .
'<textarea id="config-update-log" name="UpdateLog" rows="10" readonly="readonly">'
);
$this->parent->output->flush();
$result = $installer->doUpgrade();
$this->addHTML( '</textarea>
-<script>jQuery( "#config-spinner" )[0].style.display = "none";</script>' );
+<script>jQuery( "#config-spinner" ).hide()</script>' );
$this->parent->output->flush();
if ( $result ) {
// If they're going to possibly regenerate LocalSettings, we