function seteffect() {
    num = getRandom(10000,30000);
    setTimeout('display()',num);
}

function getRandom(min,max)
{
   return (Math.round(Math.random()*(max-min)))+min;
}

function display(){

	if (document.getElementById) {
		document.getElementById("effect").innerHTML="<img src=\"../images/flame.gif\" width=375 height=125 border=0>";
	}
	else if (document.all) {	
		effect.innerHTML="<img src=\"/images/flame.gif\" width=375 height=125 border=0>";
	}
	else if (document.layers) {
		messagecontent="<img src=\"/images/flame.gif\" height=125 width=375 border=0>";
		document.effect.document.write(messagecontent);
		document.effect.document.close();
	}

seteffect();
}