Java EE (Java Enterprise Edition) General Discussion

Hi ,
Has anyone come across a problem with showmodaldialog where you try to open a child JSP(showmodaldialog ) from a parent JSP, and on click of submit button on child JSP (showmodaldialog ) it is submitted to a servlet and the output is again the parent JSP refreshed with new data .The problem is when we try to repeat this for second time, as soon as the Child JSP(showmodaldialog ) submit button is clicked the entire IE window (both child and parent JSP's) gets closed without any warning.The server log says Java.net.SocketException.
can anyone please suggest a workaround regarding this.?
we are using showmodaldialg to lock the parent JSP .Is there any alternative for locking the parent JSP.It would be better if the alternative is compatible for both IE and Netscape.