var ie=document.all&&navigator.userAgent.indexOf("Opera")==-1
var dom=document.getElementById&&navigator.userAgent.indexOf("Opera")==-1


var iframeprops='width=610px height=290px marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"'


var randomcontent=new Array()
randomcontent[0]="random1.htm"
randomcontent[1]="random2.htm"
randomcontent[2]="random3.htm"


if (ie||dom)
document.write('<iframe id="dynstuff" src="" '+iframeprops+'></iframe>')

function random_iframe(){
if (ie||dom){
var iframeobj=document.getElementById? document.getElementById("dynstuff") : document.all.dynstuff
iframeobj.src=randomcontent[Math.floor(Math.random()*randomcontent.length)]
}
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(random_iframe);