property intValue

This property is used to get and set the integer value for the style variant.

function onSample()
{
    var rootBox = scene.rootBox;
    if (rootBox)
    {
        var styleVar = rootBox.getStyle("top");
        if (styleVar && !styleVar.isNull)
        {
            shell.print("value = " + styleVar.intValue);
        }
    }
}