To embed a graph into an HTML document, you use an <applet> tag with attributes:
<applet code="AppletPremon.class" width=100 height=120>
<param name="base" value="
val * (int, int) : int;
val + (int, int) : int;
val - (int, int) : int;
val / (int, int) : int;
">
<param name="exp" value="
(1+2)*3
">
</applet>