How to write a sample QT application that will be invoked by a Javascript?

[shreyas]

I want to write a mechanism where the method in QT - like Qstring getstring() will be invoked by a Javascript.
I have a html file, this has a js code. I want the QT function to be invoked by the JS. How can I do so? Please do explain with an example. I am using QT creator to build my QT application. I am using notepad to build my html, JS file.