Real time data display on another web page

I have a requirement from my company to display data entered on one web page to another web page on a real time basis as the user types. I am able to show data on other page using Ajax, but its not on real time basis rather it is shown when the user typing the data presses a submit button. How can I achieve it on real time basis. The data should be displayed as the user types. Please any help will be highly appreciated.