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<form class="aui">
	<button type="button" class="aui-button" id="myToggler">Toggle</button>
</form>
<script type="text/javascript">
  AJS.toInit(function() {
     AJS.$('#myToggler').click(function(){
       AJS.$('#block1').toggle();
       AJS.$('#block2').toggle();
	 });
  });
</script>