/*function resize_iframe()
{
  document.getElementById("cn_iframe").style.height=parseInt((document.documentElement.clientHeight-document.getElementById("cn_iframe").offsetTop)-95)+"px";
//alert ("screen.height " + screen.height);
//alert ("screen.availHeight " + screen.availHeight);
hoehe = document.getElementById('cn_iframe').content.height;
alert ("hoehe iframe " + hoehe);
}
*/

function resize_iframe() {
 try {
  document.getElementById("cn_iframe").style.height = parseInt((document.documentElement.clientHeight - document.getElementById("cn_iframe").offsetTop) - 95 ) + "px";
  //alert ("screen.height " + screen.height);
  //alert ("screen.availHeight " + screen.availHeight);
  hoehe = document.getElementById('cn_iframe').content.height;
  //alert ("hoehe iframe " + hoehe);
 } catch(e) { /*Element nicht vorhanden*/ }
}

window.onresize=resize_iframe;