В хтмл-верх

Код:
<style type="text/css">
#spo_all {width: 95%; margin: 0 auto 0 auto;}
#spo_top {border: 0px solid; color: #000; font-weight: bold; font-family: "Courier New", Courier, monospace; font-size: 12px; margin: 8px auto 0 auto;
padding: 0px; height: 28px; cursor: pointer;}
#spoiler4 { background: #FAFCFE; border: 1px dotted #000; border-top: 0; padding: 4px; margin: 0 auto 8px auto; display:none;}
#spo_option { font-weight:bold; cursor:pointer; float:left;}
#spo_desc { float:right;}
</style>

В хтмл-форма ответа

Код:
<div class="main" id="spo_all"><input class="category" type="button" value="Радикал" id="spo_top" onclick="obj=this.parentNode.childNodes[1].style; tmp=(obj.display!='block') ? 'block' : 'none'; obj.display=tmp; return false;"><div id="spoiler4"><iframe id="radikal" src="http://www.radikal.ru/" width=790 height=500 frameborder=1></iframe><br /></div></div><br><Br>