Add ondocumentready listener which fires init, to handle rare cases w…

…hen init is not fired by the initial script execution nor by the element oncontentready handler. Fixes issue #23.

sources/htc_open.txt

@@ -12,6 +12,7 @@ Dual-licensed for use under the Apache License Version 2.0 or the General Public
     <PUBLIC:ATTACH EVENT="onmouseenter" FOR="element" ONEVENT="mouseEntered()" />
     <PUBLIC:ATTACH EVENT="onmouseleave" FOR="element" ONEVENT="mouseLeft()" />
     <PUBLIC:ATTACH EVENT="oncontentready" FOR="element" ONEVENT="init()" />
+    <PUBLIC:ATTACH EVENT="ondocumentready" FOR="element" ONEVENT="init()" />
     <PUBLIC:ATTACH EVENT="ondetach" FOR="element" ONEVENT="cleanup()" />
 
     <script type="text/javascript">