js自定义函数,文本框值相加

更正下
<script type="text/javascript">
function sum()
{
  for(var j=1;j++){
  for(var i=1;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;  document.getElementById(totalcost).value==document.getElementById(agocost).value+document.getElementById(sumcost).value
  }
  }
  }
</script>

var s = document.getElementById("input1_"+j+"_"+i).value;
var b = document.getElementById("input2_"+j+"_"+i).value;
document.getElementById("input3_"+j+"_"+i).value=s+b;
还有你的for循环怎么结束？

i和j是asp网页中的变量参数，i和j是动态的，我也不解不知道该如何写这个函数
接下来还会增加个文本框，value等于（input2_1_1,input2_2_1 ... input_j_1）之和
那个自定义函数有相通之处

asp里面，arr_linei、 rownum 有范围吗，例如从1到多少之间，还是固定等于几的值？不能asp里面相加吗，如response.Write("<td><INPUT id=input3_" & arr_linei & "_" & rownum & " type=text value="&(agocost +sumcost)&" size=3></td>")

arr_linei、 rownum没有范围，是根据数据动态得到的，不能在asp中相加(里面还有循环，值就重复累加了)
我想得到，如：input3_1_1.value=input1_1_1.value+input2_1_1.value（自定义函数中不知道该如何写）

arr_linei、 rownum怎么个动态法？

当月多少员工（rownum）做过多少不重复个项目数（arr_linei)

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<script type="text/javascript">

</script>
</HEAD>
<BODY onLoad="init()">
<table>
<tr>
  <td>价格</td>
  <td>数量</td>
  <td>金额</td>
</tr>
<form id="form1" name="form1">
<tr>
  <td><input type="radio" id="price1" name="price" checked onClick="stotal()" value="168"> </td>
  <td>1磅 13*13(cm)</td>
  <td> 168元</td>
</tr>
<tr>
  <td><input type="radio" id="price1" name="price" onClick="stotal()" value="269"> </td>
  <td>2磅 17*17(cm)</td>
  <td> 269元</td>
</tr>
<tr>
  <td><input type="radio" id="price1" name="price" onClick="stotal()" value="439"> </td>
  <td>3磅 23*23(cm)</td>
  <td> 439元</td>
</tr>
<tr>
  <td><input type="radio" id="price1" name="price" onClick="stotal()" value="650"> </td>
  <td>5磅 30*30(cm)</td>
  <td> 650元</td>
</tr>
<tr>
  <td> </td>
  <td align="right" >购买数量：</td>
  <td><label>
  <select name="num" id="num" onChange="stotal()">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
<option value="7">7</option>
  <option value="8">8</option>
  </select>
  </label></td>
</tr>
<tr>
  <td><span style="text-align:right">总计</span></td>
  <td > <div id="total" ></div></td>
  <td>元</td>
</tr>
</form>
</table>
</BODY>
</HTML>
不知道  你要的是不是这样的？

谢谢楼上的，我还是把我的全部代码贴上吧，我写的函数肯定有问题，不知道该如何改
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">
function sum(id){  for(var j=1;j++){
  for(var i=1;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;
  var a==document.getElementById(agocost).value;
  var s==document.getElementById(sumcost).value;  document.getElementById(totalcost).value==a+s;
  }
  }
  }
</script>
</head>
<body>

<table border="1"   cellpadding="0" cellspacing="0">
  <tr>
    <td align="center">项目名</td>
    <td align="center">员工名</td>
     <%
     set rs=conn.execute("select a.name,b.username from userinf as a ,wl_check as b where cint(b.month)=cint(month(now)) and cint(b.year)=cint(year(now)) and b.confirm='1' and a.username=b.username ")
arr_row=rs.GetRows
arr_rows=Ubound(arr_row,2)  '得到数组中数据的下标
For arr_rowi=0 To arr_rows
     username=arr_row(0,arr_rowi)
wl_name=arr_row(1,arr_rowi)
         response.Write("<td width='30' align='center'>"&username&"("&wl_name&")")
next
     response.Write"</td>"
rs.close
response.Write"</tr>"

set sql=conn.execute("select distinct a.prj_name from wl_per_project as a,wl_check as b where cint(a.month)=cint(month(now)) and cint(a.year)=cint(year(now)) and cint(b.month)=cint(month(now)) and cint(b.year)=cint(year(now)) and a.username=b.username ")
arr_line=sql.GetRows
arr_lines=Ubound(arr_line,2)  '得到数组中数据的下标
For arr_linei=0 To arr_lines
     prj_name=arr_line(0,arr_linei)
response.Write"<tr>"
         response.Write("<td rowspan='3' width='180' align='left'>"&prj_name&"</td>")
response.Write("<td>以往投入</td>")
  set ago_rs=conn.execute("select sum(worklog.prj_cost_time) as agocost,worklog.username  from worklog,wl_per_project where worklog.username=wl_per_project.username and worklog.prj_id=wl_per_project.prj_id  and wl_per_project.prj_name='" & prj_name & "'  and cdate(worklog.prj_date)<'2011-2-1' and worklog.username in (select username from wl_check where  confirm='1' and datediff('d',Cdate(year & '-' & month & '-' & '01'),'2011-2-1')>0) group by worklog.username ")
arr_ago=ago_rs.GetRows
arr_agos=Ubound(arr_ago,2)
for arr_agoi=0 to arr_agos
     agocost=arr_ago(0,arr_agoi)
agousername=arr_ago(1,arr_agoi)
         next
for rownum=0 to arr_rows
ago_name=arr_row(1,rownum)
if agousername=ago_name then
response.Write("<td><INPUT id=input1_" & arr_linei & "_" & rownum & " type=text  value=" & agocost & " size=3 ></td>")
         else
response.Write("<td><INPUT type=text id=input1_" & arr_linei & "_" & rownum & " size='3'></td>")
end if
next
response.Write"</tr>"

           response.Write"<tr>"
           response.Write("<td>当月投入</td>")
      for rownum=0 to arr_rows
  wl_name=arr_row(1,rownum)
      set rs=conn.execute("select sum(worklog.prj_cost_time) as sumcost  from worklog,wl_per_project where worklog.username='" & wl_name & "' and wl_per_project.username='" & wl_name & "' and worklog.prj_id=wl_per_project.prj_id and cint(wl_per_project.month)=cint(month(now)) and cint(wl_per_project.year)=cint(year(now)) and month(worklog.prj_date)=month(now) and year(worklog.prj_date)=year(now) and wl_per_project.prj_name='" & prj_name & "'")
sumcost=rs("sumcost")
          response.Write("<td><INPUT id=input2_" & arr_linei & "_" & rownum & " type='text' value='"&sumcost&"'  size='3'></td>")
      next
            response.Write"</tr>"

           response.Write"<tr>"
           response.Write("<td>累计投入</td>")
      for rownum=0 to arr_rows
          response.Write("<td><INPUT id=input3_" & arr_linei & "_" & rownum & " type='text'  size='3' onblur='sum()'></td>")
      next
            response.Write"</tr>"      next
      %>
</table>
</body>
</html>

分析代码如下，思路参考：土办法：JS和ASP传递变量，因为所有input是ASP后台动态输出的，也就是说其个数在JS端无法预先知道循环次数，所以你可以考虑前后端传输的问题，也就是在后台通过<% response.write('var index=通过ASP获取的循环数')%>，最后记得这句要放到<script>标签里，否则JS无法引用！
然后在前端就可以根据ASP里定义的JS变量index来获取输出了几次循环了！好方法:不管ASP里的循环是几次，所有的INPUT ，用JQUERY的each方法来遍历，然后根据ID特征来判断如何加，这个其实我认为是比较好的方法！

<SCRIPT LANGUAGE="JavaScript">
  
  </SCRIPT>
for(var j=1;j<n;j++){
  for(var i=1;i<m;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;
  var a==document.getElementById(agocost).value;
  var s==document.getElementById(sumcost).value;  document.getElementById(totalcost).value==a+s;
  }
  }
  }

代码执行时这句代码报错
var a=document.getElementById(agocost).value;
错误：缺少对象；

谢谢各位！！
  <SCRIPT LANGUAGE="JavaScript">
  window.onload=function sum(){  for(var j=1;j<m;j++){
  for(var i=1;i<n;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;
  var a=document.getElementById(agocost).value;
  var s=document.getElementById(sumcost).value;  document.getElementById(totalcost).value=a+s;  }
  }
  }
</script>
还有个问题，一、是a+s变成了字符串连接，（需要是数字相加）

自己修改了下，还是有点问题，当值为空时如何不显示NaN
    <SCRIPT LANGUAGE="JavaScript">
  window.onload=function sum(){  for(var j=0;j<m;j++){
  for(var i=0;i<n;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;
  var a=parseFloat(document.getElementById(agocost).value);
  var s=parseFloat(document.getElementById(sumcost).value);  document.getElementById(totalcost).value=a+s;  }
  }
  }
</script>
运行结果如下图：
http://hi.csdn.net/attachment/201103/3/2919155_1299134478bmCO.jpg

如果a和s 是整数就这样
document.getElementById(totalcost).value=parseInt(a,10)+parseInt(s,10);//10表示10进制的
如果不是整数那就这样
document.getElementById(totalcost).value=parseFloat(a)+parseFloat(s);

NaN就是未知的参数类型，
出现这个是因为document.getElementById(agocost).value等于"";再用parseFloat转换造成的.
判断一下
window.onload=function sum(){
var a,s;
  for(var j=0;j<m;j++){
  for(var i=0;i<n;i++){
  var agocost,sumcost,totalcost;
  agocost="input1_"+j+"_"+i;
  sumcost="input2_"+j+"_"+i;
  totalcost="input3_"+j+"_"+i;
if(document.getElementById(agocost).value!=""&&document.getElementById(sumcost).value!=""){
  a=parseFloat(document.getElementById(agocost).value);
s=parseFloat(document.getElementById(sumcost).value);
document.getElementById(totalcost).value=a+s;
}
  }
  }
  }
</script>

用了循环，但是却没有保留值，最后的结果还是会出问题，每次的agocost这些获取都会是最后一个I或J的对应ID。问题依然会有！循环后最后的是会出问题的！。

给一个以前我操作的类似例子，你参考思路修改自己的代码吧！代码不多，但是绝对精辟！整体保存为ASP文件<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(function(){
$('input[id$=id3]').each(function(i,obj){//点击第I个的最后一个文本框即可统计获得的前2个和
   $(obj).click(function(){
          $(obj).val(parseInt($('input[id='+(i+1)+'id1]').val())+parseInt($('input[id='+(i+1)+'id2]').val()));
         });
});

});</script>
<%
str=""
For i=1 To 15 '这里循环随便加多少都可以,i为外部循环次数，j是内部循环次数即1，2，3，固定的；
    For j=1 To 3
    str=str&"第"&i&"个INPUT循环   <input type='text' id="&i&"id"&j&" value="&i&" /><br/>"
next
next
response.write str
%>

调试易

js自定义函数,文本框值相加

解决方案 »