在2个JQuery Click函数之间重叠

<input id="btnPost" type="button" value="Post" style="width: 79px" />
<input id="btnAssign" type="button" value="Assign" style="width: 79px" />
<div id="div1">
    <textarea rows="10" cols="2" style="width: 401px"></textarea><br />
    <input id="btnPost2" type="submit" name="btnPost" value="Post" style="width: 60px" />
</div>
<div id="div2">
    <textarea rows="10" cols="2" style="width: 401px"></textarea><br />
    <input id="btnAssign2" type="submit" name="btnAssign" value="Assign" style="width: 60px" />    
</div>
<input id="btnPost" type="button" value="Post"