求解释下这段代码,最主要的是详细解释下条件语句和 onclick,那个好像是各种嵌套吧,所以我希望大神们能一个点一个点的讲~拜托了,各位大神,可怜可怜我这个新手吧,
<s:form action="Save" id="form1" theme="simple" >
<div class="buttonDiv">
<s:submit theme="simple" value="保存" cssClass="button_style"/>
<s:if test="gongWenLeiBie.id>0">
<s:submit theme="simple" name="Delete" value="删除" cssClass="button_style" method="dele"/>
</s:if>
<input type="button" class="button_style" value="返回"
onclick="javascript:window.location.href='./List.action'"/>
</div>