document.write('<div>smaple1</div><div class="qa_lay"><div>Ｑ：<a href="javascript:;" onClick="treeview(&#039;lay1&#039;);">tes</a></div><div id="lay1" style="display:none" class="a_lay">tes</div><div>Ｑ：<a href="javascript:;" onClick="treeview(&#039;lay2&#039;);">tes</a></div><div id="lay2" style="display:none" class="a_lay">tes</div></div><div>samaple2</div><div class="qa_lay"></div><div>sample3</div><div class="qa_lay"></div>');