子窗体2.html为:
<script type="text/javascript">
var obj = window.dialogArguments
alert("Your transmission parameters:" + obj.name);
window.close();
</script>
父窗体:
<script type="text/javascript">
var obj = new Object();
obj.name="suzsoft";
obj.address="suzhou";
window.showModalDialog("2.htm",obj,"dialogWidth=200px;dialogHeight=100px");
</script>

alert("Your transmission parameters:" + parent.obj.name);
这样试试,记得是这个parent反正你得指定是父的.

opener.obj.name