<html>
<head>
<script language="JavaScript">
<!--
function calculate(val){
var ar=val.split(" ");
if(ar.length <2){alert("");return;}
var idx = parseInt(ar[0],10);
if(isNaN(idx)){alert("");return;}
var num = parseInt(ar[1],10);
if(isNaN(num)){alert("");return;}
var ipts = document.getElementById("divContainer").getElementsByTagName("input");
var iptVal = parseInt(ipts[idx+1].value,10)||0;
ipts[idx+1].value = iptVal + num;
}
window.onload=function(){
document.getElementById("txtOp").onkeypress = function(){
if(event.keyCode == 13)
document.getElementById("btnOp").click();
}
document.getElementById("btnOp").onclick = function(){
calculate(document.getElementById("txtOp").value);
}}
//-->
</script>
</head>
<body>
<div id="divContainer">
<script language="JavaScript">
<!--
for(var i=0;i<99;i++)
document.write("<input size='8'>")
//-->
</script>
</div>
请输入操作:<input type="text" id="txtOp"><input type="button" id="btnOp" value="计算">
</body>
</html>
<head>
<script language="JavaScript">
<!--
function calculate(val){
var ar=val.split(" ");
if(ar.length <2){alert("");return;}
var idx = parseInt(ar[0],10);
if(isNaN(idx)){alert("");return;}
var num = parseInt(ar[1],10);
if(isNaN(num)){alert("");return;}
var ipts = document.getElementById("divContainer").getElementsByTagName("input");
var iptVal = parseInt(ipts[idx+1].value,10)||0;
ipts[idx+1].value = iptVal + num;
}
window.onload=function(){
document.getElementById("txtOp").onkeypress = function(){
if(event.keyCode == 13)
document.getElementById("btnOp").click();
}
document.getElementById("btnOp").onclick = function(){
calculate(document.getElementById("txtOp").value);
}}
//-->
</script>
</head>
<body>
<div id="divContainer">
<script language="JavaScript">
<!--
for(var i=0;i<99;i++)
document.write("<input size='8'>")
//-->
</script>
</div>
请输入操作:<input type="text" id="txtOp"><input type="button" id="btnOp" value="计算">
</body>
</html>
<html>
<head>
<script language="JavaScript">
<!--
function calculate(val){
var ar=val.split(" ");
if(ar.length <2){alert("输入的表达式不合要求");return;}
var idx = parseInt(ar[0],10);
if(isNaN(idx)){alert("输入的序号非法");return;}
if(idx<1 || idx > 99){alert("输入的序号超出范围");return;}
var num = parseInt(ar[1],10);
if(isNaN(num)){alert("输入的数值非法");return;}
var ipts = document.getElementById("divContainer").getElementsByTagName("input");
var iptVal = parseInt(ipts[idx-1].value,10)||0;
ipts[idx-1].value = iptVal + num;
}
window.onload=function(){
document.getElementById("txtOp").onkeypress = function(){
if(event.keyCode == 13)
document.getElementById("btnOp").click();
}
document.getElementById("btnOp").onclick = function(){
calculate(document.getElementById("txtOp").value);
}}
//-->
</script>
</head>
<body>
<div id="divContainer">
<script language="JavaScript">
<!--
for(var i=0;i<99;i++)
document.write("<input size='8' value='0'>")
//-->
</script>
</div>
请输入操作:<input type="text" id="txtOp" value="20 -20"><input type="button" id="btnOp" value="计算">
</body>
</html>
window.onload=function(){
document.getElementById("txtOp").onkeypress = function(){
if(event.keyCode == 13){
document.getElementById("btnOp").click();
this.value="";
//I think better is
this.select();
}
}