hi....
i'm now develop a web based system....and im using frame..in the top frame there is 4 button (laman utama, surat masuk, surat keluar and logout).my problem is....i have a page(if they click surat masuk and surat keluar button) where user have to key in data and system will save all the data.however after insert the data and user want to click to other botton in the frame...they will be display with another window....that means,the window will be redundant....how to solve this problem....please help me

Look up the "target" property in HTML.