i have 2 frames in my page,on left side(frame) i have a list box and on the right side(frame) i have some controls,now in the onchange event of listbox(left frame) i am displaying the values in the right frame,there r some combos as well in the right frame,well the data is been inserted in the text boxes,text areas(some ctrls in right frame) ,but "invalid argument" error appears while adding data into combos,here is the code<BR><BR>var oOption=document.createElement("OPTION");<BR>oOpti on.text="Some data"<BR>parent.document.frames.item("frmRight").c mbEditor.add(oOption);<BR><BR>well its working nicely if the combo is in the same frame :),but fails to work in other frames!!<BR> -Regards-