<input type="text" name="text1">
<input type="text" name="text2">
<input type="text" name="text3">
<input type="text" name="text4">
<input type="text" name="text1">
<input type="text" name="text2" onKeyDown="if(event.keyCode==13){suan();}">
<input type="text" name="text3">
<input type="text" name="text4">
<script language="javascript">
function suan()
{
text3.value=Math.round(parseFloat(text1.value)*parseFloat(text2.value)*1000)/1000;
}
</script>
<input type="text" name="text2">
<input type="text" name="text3">
<input type="text" name="text4">
<input type="text" name="text1">
<input type="text" name="text2" onKeyDown="if(event.keyCode==13){suan();}">
<input type="text" name="text3">
<input type="text" name="text4">
<script language="javascript">
function suan()
{
text3.value=Math.round(parseFloat(text1.value)*parseFloat(text2.value)*1000)/1000;
}
</script>
<input name="t2" type="text" onkeydown="if(event.keyCode==13){document.all.t4.focus();document.all.t3.value=parseInt(document.all.t1.value)*parseInt(document.all.t2.value);return false;}">
<input name="t3" type="text">
<input name="t4" type="text">
form有名字的话,用formName代替document.all也可以
<input type="text" name=bb onkeyup="guagua()">
<input type="text" name=cc>
<input type="text" name=dd>
<script>
function guagua()
{if(event.keyCode==13)
{document.all.cc.value=Number(docment.all.aa.value)*Number(docment.all.bb.value);
document.all.dd.focus();}
}
<input name="t1" tabindex=1 type="text">
<input name="t2" tabindex=2 type="text" onblur="form1.t3.value=form1.t1.value*form1.t2.value">
<input name="t3" tabindex=4 type="text">
<input name="t4" tabindex=3 type="text">
</form>
{
if (event.keyCode==13)
{
event.keyCode=9;
form1.Sum.value = form1.Point.value * form1.Number.value
}
}
</script> <form action="a.php" method="get" name="form1">
单价:<input type="text" name="Point" value="5" onkeydown='javascript:if (event.keyCode==13) event.keyCode=9;' tabindex=1> 数量:<input type="text" name="Number" value="3" onkeydown="keydown()" tabindex=2> 合计:<input type="text" name="Sum" value="">
<input type="text" name="Other" value="" tabindex=3>
</form>
<p>
数量:<input type="text" name="text2" onKeyDown="if(event.keyCode==13){suan();}">
</p>
<p>
合计:<input type="text" name="text3">
</p>
<p>
<input type="text" name="text4">
<script language="javascript">
function suan()
{
text3.value=Math.round(parseFloat(text1.value)*parseFloat(text2.value)*1000)/1000;
text4.focus();
}
</script></p>