I have an application where I am using Master and content page concept. In my master page I have a header navigation and a left navigation bar. My requirement is when any IMages in the header column is clicked, its sub functions must appear in the left navigation bar which I have done using dynamically generated hyperlinks. But my second requirement is when any of these generated hyperlinks are clicked, they must changes color to indicate that they are highlighted, for example from white to red background. Please advice as how to achieve this.