This technique is implemented by creating a Hidden frame in page which will contain your data to be cached.
<FRAME src="data_of_hidden_frame. html">
<FRAME src="data_of_hidden_frame.html" frame border="0" no resize scrolling="yes">
Above is a sample of hidden frames where the first frame “data_of_frame1.html” is visible and the remaining frames are hidden by giving whole col section to first frame. 100 % is allocated to first frame and remaining frames thus remain hidden.