//function resize_iframe(){
//window.frames[0].height = 1000;
//document.getElementById("contentframe").height=1000
//alert(window.frames[0].document.body.scrollHeight)
//alert(document.getElementById('contentframe').height)
//window.frames[0].height=window.frames[0].document.body.scrollHeight
//} 

function resize_iframe(){

parent.document.getElementById("contentframe").height=100;
//alert(parent.document.getElementById("contentframe").height)
parent.document.getElementById("contentframe").height=parent.frames["contentframe"].document.body.scrollHeight;
//alert(parent.document.getElementById("contentframe").height)
}