How to adjust font size?

In this post you will see how can we change the font size on the fly.

Style.css

.bodyContent14
{
FONT-SIZE: 13px; LINE-HEIGHT: 14px
}

.bodyContent16
{
FONT-SIZE: 15px; LINE-HEIGHT: 16px
}

Page.aspx

function doZoom(size)

{

   var o = document.getElementById(”bodyContent”).className = ”bodyContent” + size;

}

The text inside the Div will change and  adjust Font size 16 to 14.