<form name="form">
<INPUT TYPE="text" name="entry" VALUE="" onkeyup="calculate()">
<TABLE>
<TR>
<TD>名称</TD>
<TD>单位用量</TD>
<TD>总用量</TD>
</TR>
<TR>
<TD>aa</TD>
<TD>2<input type="hidden" name="u" value=2></TD><!-- varlue=<%=rs("unit_amount")%> -->
<TD><input name="twice"></TD>
</TR>
<TR>
<TD>bb</TD>
<TD>3<input type="hidden" name="u" value=3></TD>
<TD><input name="twice"></TD>
</TR>
</TABLE>
</form>
<script language="JavaScript"> function calculate()
{
var entry = document.form.entry.value;//自己判断是否合法
for(var i=0;i<document.form.u.length ;i++ )
{
document.form.twice[i].value = document.form.u[i].value * entry;
}
}</script> 看看吧
<table border="1" id="inps">
<tr><td>aa</td><td>2</td><td><input type="text" /></td></tr>
<tr><td>aa</td><td>2</td><td><input type="text" /></td></tr>
</table>
<script language="JavaScript">
var inps = document.getElementById('inps').getElementsByTagName('input');
for(var i=0; i<inps.length; i++){
inps[i].onblur = function(){ // 也可以改成onkeyup但非常不好
var p = this.parentNode.parentNode, n = p.cells[p.cells.length-2].innerHTML;
status = n + ' | ' + this.value;
this.value = parseInt(n)*this.value;
}
}
</script>
<head runat="server">
<title>Ajax应用之加法运算</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp=new XMLHttpRequest();
}
}
function addNum()
{
createXMLHttpRequest();
var url="Handler.ashx?Num1="+document.getElementById("num1").value+"&Num2="+document.getElementById("num2").value
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=showResult;
xmlHttp.send(null);
}
function showResult()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
document.getElementById("result").value=xmlHttp.responseText;
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="num1" type="text" onkeyup="addNum()"/>+<input id="num2" type="text" onkeyup="addNum()"/>=
<input id="result" type="text" /></div>
</form>
</body>
</html>Handler.ashx页面:
<%@ WebHandler Language="C#" Class="Handler" %>using System;
using System.Web;public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
int result = Convert.ToInt32(context.Request.QueryString["Num1"]) + Convert.ToInt32(context.Request.QueryString["Num2"]);
context.Response.Write(result);
}
public bool IsReusable {
get {
return false;
}
}}
直接拷贝 即可运行...不过用的是onkeyup事件...2楼的说不好...