function embed(elemid){
var FlashArray = new Array();
    FlashArray[0]  = "flash1.swf"; 
    FlashArray[1]  = "flash2.swf";
var FlashDir   = "/images/";
var FlashWidth ="646";
var FlashHeight="105";
var FlashWmode="transparent";
var XHTML = true;

XHTML=(XHTML)?'/':'';
var ran = Math.floor(Math.random()*FlashArray.length)
var RetFlash='<embed src="'+FlashDir+FlashArray[ran]+'" width="'+FlashWidth+'" height="'+FlashHeight+'" wmode="'+FlashWmode+'"'+XHTML+'>';

document.getElementById(elemid).innerHTML=RetFlash;
}