< form id = "form1" name = "form1" method = "post" action = "" >
< label >
< input type = "text" name = "t1" /><input type="text" name="t2" />
< input type = "text" name = "t3" /> <input type="button" name="Submit" value="计算" onclick="js();" />
</label>
</form >
< script >
function js() {
form1.t2.value = formatFloat(form1.t1.value / 100 * 90, 4);
form1.t3.value = formatFloat(form1.t1.value / 100 * 10, 4);
}
function formatFloat(src, pos) {
return Math.round(src * Math.pow(10, pos)) / Math.pow(10, pos);
}
</script>