方案一
<iframe name="myiframe" id="myiframe" src="#" frameborder="0" scrolling="no"></iframe>
<script type="text/javascript" language="javascript">
$(window.parent.document).find("#myiframe").load(function(){
var main = $(window.parent.document).find("#myiframe");
var thisheight = $(document).height()+30;
main.height(thisheight);
});
</script>
方案二
拖拽窗口iframe也可以自适应高度
<iframe name="myiframe" id="myiframe" src="#" frameborder="0" scrolling="no"></iframe>
<script type="text/javascript" language="javascript">
function changeFrameHeight(){
var ifm= document.getElementById("myiframe");
ifm.height=document.documentElement.clientHeight-56;
}
window.onresize=function(){ changeFrameHeight();}
$(function(){changeFrameHeight();});
</script>