父页面的代码

                      <div id="div5" style="position:relative;height:500px;">

                       <iframe scrolling="auto" frameborder="0"  id="content" name="content" src ="./cpcia_gonggao.jsp"

                        bordor="0" style="width:800px;height:500px;">

                       </iframe>

                       </div>  

 

子页面的JS代码

 

<script>

$(function(){

    var p_window = window.top;

    alert($(p_window).height());

    var p_demo = window.top.document.getElementById('content');

    var val=window.top.document.getElementById('div5');

    alert($(p_demo).height()); 

    p_demo.style.height="1300px";

    val.style.height="1300px";

})

</script>