how to call unload event of iframe

[Woody]

I used jquery to show multiple child.aspx pages in different tabs in my parent.aspx page.\[code\]$('#tabcontent').append('<iframe width="100%" frameborder="0" scrolling="no" onload="adjustMyFrameHeight(' + count + ');"id="c' + count + '" src="' + srcpage + '" >' + '</iframe>)\[/code\]Now I want to call the Page_Unload method of all the child.aspx pages on parent Unload.What I need is to store the information on each child.aspx page in the session and then reassign the session to each page.