<script language="Javascript">

function myFunction4() {
var val1 = parseInt(document.myForm4.s001.value);
var val2 = parseInt(document.myForm4.s002.value);
var val3 = parseInt(document.myForm4.s003.value);
var val4 = parseInt(document.myForm4.s004.value);
var val5 = parseInt(document.myForm4.s005.value);
var val6 = val3+val4
var val7 = val3+val4*val5
document.myForm4.s001.value = val6;
document.myForm4.s002.value = val7;
}
</script>
<table><form name="myForm4">

<tr><td>Урон</td><td>
<input name="s001" type="Text"size=5 value="0">
-
<input name="s002" type="Text" size=5 value="0"></td></tr>
<tr><td>Базовый урон</td><td><input type="text" name="s003"SIZE=17></td></tr>
<tr><td>Количество Костей</td><td><input type="text" name="s004"SIZE=17  ></td></tr>
<tr><td>Количество граней у кости</td><td><input type="text" name="s005" SIZE=17 ></td></tr>
<tr><td><input type="button" name="Button4" value="Подсчет" onclick="myFunction4(); return true;">
</td></tr>
</form></table>