<script language="JavaScript">
function count() {
document.formname.Total.value = parseFloat(document.formname.Price.value) *
parseFloat(document.formname.Counts.value) +
parseFloat(document.formname.Carriage.value);
}
</script>
<form name="formname">
单价:<input type="text" name="Price" size="23" value="10.40">
数量:<input type="text" name="Counts" size="23" value="5.00">
运费:<input type="text" name="Carriage" size="23" value="8.20">
合计:<input type="text" name="Total" size="23">
<input type="button" value="Count" onclick="count()">
</form>
function count() {
document.formname.Total.value = parseFloat(document.formname.Price.value) *
parseFloat(document.formname.Counts.value) +
parseFloat(document.formname.Carriage.value);
}
</script>
<form name="formname">
单价:<input type="text" name="Price" size="23" value="10.40">
数量:<input type="text" name="Counts" size="23" value="5.00">
运费:<input type="text" name="Carriage" size="23" value="8.20">
合计:<input type="text" name="Total" size="23">
<input type="button" value="Count" onclick="count()">
</form>
function compute()
{
ss=formname.Price.value+'*'+formname.Counts.value+'*'+formname.Carriage.value
alert(ss+'='+eval(ss))
}