金额1<input type=text name=text1 value=0 onpropertychange=woyingjie()>
金额2<input type=text name=text2 value=0 onpropertychange=woyingjie()>
金额3<input type=text name=text3 value=0 onpropertychange=woyingjie()>
总计<input type=text name=text4 value=0>
<script>
function woyingjie(){
var text1=parseInt(document.all.text1.value);
var text2=parseInt(document.all.text2.value);
var text3=parseInt(document.all.text3.value);
var text4=text1+text2+text3;
document.all.text4.value=text4;
}
</script>
金额2<input type=text name=text2 value=0 onpropertychange=woyingjie()>
金额3<input type=text name=text3 value=0 onpropertychange=woyingjie()>
总计<input type=text name=text4 value=0>
<script>
function woyingjie(){
var text1=parseInt(document.all.text1.value);
var text2=parseInt(document.all.text2.value);
var text3=parseInt(document.all.text3.value);
var text4=text1+text2+text3;
document.all.text4.value=text4;
}
</script>
金额1<input type=text name=price value=0 onpropertychange=calc()>
金额2<input type=text name=price value=0 onpropertychange=calc()>
金额3<input type=text name=price value=0 onpropertychange=calc()>
总计<input type=text name=sumprice value=0>
</form><script>
function calc()
{ var sum=0;
for(var i=0;i<form1.price.length;i++)
{
if (!isNaN(Number(form1.price[i].value)) sum+=Number(form1.price[i].value);
}
form1.sumprice.value=sum;
}
</script>