Expression :<BR>
<INPUT   Type=TEXT   Name=Edit1   Size=70   Value="1 + 2 + 3 + 4 + 5"   ><BR><BR><BR>


<BLOCKQUOTE>
   <INPUT   Type=BUTTON   Value="Evaluate"
      OnClick="EditResult.value=eval(Edit1.value);"   > &nbsp; &nbsp;

   Result : 
   <INPUT   Type=TEXT   Name=EditResult   Size=25   Value=""   >
</BLOCKQUOTE>