ActionScript 3.0 :: Embedding SWF File With SWFObject?

I'm trying to embed my .swf file with swfobject, and pass the parent html code to the flash file as a string. Here is the javascript code:

Code:
// FLASH EMBED
// Page Title
var parent1 = document.getElementById('pageTitle');
var flashvars = {};
flashvars.parentXML = parent1.toString();
var params = {};
params.scale = "noscale";
params.salign = "tl";
params.wmode = "transparent";
var attributes = {};
swfobject.embedSWF("flash/pageTitle.swf", "pageTitle", "510", "150", "9.0.0", "expressInstall.swf", flashvars, params, attributes);

Everything works fine until I use the toString() function in the flashvars line, which breaks the code and causes the .swf file to fail loading.