//Input the IDs of the IFRAMES you wish to dynamically resize to match its content height:
//Separate each ID with a comma. Examples: ["myframe1", "myframe2"] or ["myframe"] or [] for none:
var iframeids=["id_kralovna_iframe"]

//Should script hide iframe from browsers that don't support this script (non IE5+/NS6+ browsers. Recommended):
var iframehide="no"

//var getFFVersion=navigator.userAgent.substring(navigator.userAgent.indexOf("Firefox")).split("/")[1]
var FFextraHeight=40;  //parseFloat(getFFVersion)>=0.1? 40 : 10 //extra height in px to add to iframe in FireFox 1.0+ browsers
var IEextraHeight=80;

function resizeCaller() {
var dyniframe=new Array()
for (i=0; i<iframeids.length; i++){
if (document.getElementById)
resizeIframe(iframeids)
//reveal iframe for lower end browsers? (see var above):
if ((document.all || document.getElementById) && iframehide=="no"){
var tempobj=document.all? document.all[iframeids] : document.getElementById(iframeids)
tempobj.style.display="block"
}
}
}

//document.getElementById("id_kralovna_iframe").height
//document.getElementById("id_kralovna_iframe").contentDocument.body.offsetHeight

function resizeIframe(frameid){    
    var currentfr=document.getElementById(frameid)
    if (currentfr) {
        if (currentfr && !window.opera){
            currentfr.style.display="block"

            var browser=navigator.appName;

            if (browser=="Microsoft Internet Explorer") {
                try { var ifr_height = currentfr.Document.body.scrollHeight }
                catch (err) { var ifr_height }
                if (ifr_height) {             
                    if (ifr_height != currentfr.height) {
                        if (Math.abs(ifr_height - currentfr.height) >= (IEextraHeight/2))                     
                            currentfr.height = ifr_height+IEextraHeight;
                    }
                }
            }

            else if (currentfr.contentDocument && currentfr.contentDocument.body.offsetHeight) //ns6 syntax
            {
                var ifr_height = currentfr.contentDocument.body.offsetHeight;
                if (ifr_height) {
                    if (ifr_height != currentfr.height) {
                        if (Math.abs(ifr_height  - currentfr.height) >= (FFextraHeight/2)) 
                            currentfr.height = ifr_height + FFextraHeight; 
                    }
                }
            }

            if (currentfr.addEventListener)
              currentfr.addEventListener("load", readjustIframe, false)
            else if (currentfr.attachEvent){
              currentfr.detachEvent("onload", readjustIframe) // Bug fix line
              currentfr.attachEvent("onload", readjustIframe)
            }
        }
    }
}

function readjustIframe(loadevt) {
var crossevt=(window.event)? event : loadevt
var iframeroot=(crossevt.currentTarget)? crossevt.currentTarget : crossevt.srcElement
if (iframeroot)
resizeIframe(iframeroot.id);
}

function loadintoIframe(iframeid, url){
if (document.getElementById)
  document.getElementById(iframeid).src=url
}

if (window.addEventListener)
  window.addEventListener("load", resizeCaller, false)
else if (window.attachEvent)
  window.attachEvent("onload", resizeCaller)
else
  window.onload=resizeCaller