function iFrameHeight() {
	var h = 0;
var getFFVersion=navigator.userAgent.substring(navigator.userAgent.indexOf("Firefox")).split("/")[1]
var FFextraHeight=parseFloat(getFFVersion)>=0.1? 16 : 0 //extra height in px to add to iframe in FireFox 1.0+ browsers

	if ( !document.all ) {
		h = document.getElementById('blockrandom').contentDocument.height;
		document.getElementById('blockrandom').style.height = h + 60 + 'px';
	} else if( document.all ) {
		h = document.frames('blockrandom').document.body.scrollHeight;
		document.all.blockrandom.style.height = h + 20 + 'px';
	}
}