我正在尝试计算列表框上的值,但我的代码不起作用 这是我的javascript代码:
var val=document.getElementById('inh').value;
var temp=val.split("");
function sum(){
var val = document.getElementById('inh').value;
var temp = val.split(" ");
var total = 0;
var v;
for(var i = 0; i < temp.length; i++) {
v = parseFloat(temp[i]);
if (!isNaN(v)) total += v;
}
document.getElementById('resultSum').innerHTML=total;
}
这是html代码:
<label for="ttotal"></label>
<input type="text" name="ttotal" id="ttotal" onkeyup="sum()" />
和
<select name="inh[<?php echo $no; ?>]">
<option value="">--Pilih--</option>
<option value="1" <?php if($datatampil['dosis_inh_perhari']==1) echo 'selected'; ?>>1 tablet</option>
<option value="2" <?php if($datatampil['dosis_inh_perhari']==2) echo 'selected'; ?>>2 tablet</option>
<option value="3" <?php if($datatampil['dosis_inh_perhari']==3) echo 'selected'; ?>>3 tablet</option>
</select>
感谢的
答案 0 :(得分:0)
<input type="text" name="ttotal" id="ttotal" onkeyup="sum()" />
<input type="text" name="ttotal" id="ttotal" onkeyup="sum('[<?php echo $no; ?>]')" />
function sum( el ){
var val = document.getElementById( el ).value;
var temp = val.split(" ");
var total = 0;
var v;
for(var i = 0; i < temp.length; i++) {
v = parseFloat(temp[i]);
if (!isNaN(v)) total += v;
}
document.getElementById('resultSum').innerHTML=total;
}
答案 1 :(得分:0)
function sum( el ){ var val = document.getElementById( el ).value;
var temp = val.split(" ");
var total = 0;
var v;
for(var i = 0; i < temp.length; i++) {
v = parseFloat(temp[i]);
if (!isNaN(v)) total += v;
}
document.getElementById('resultSum').innerHTML=total;
}
和
<input type="text" name="ttotal" id="ttotal" onkeyup="sum('[<?php echo $no; ?>]')" />
答案 2 :(得分:0)
我的代码确实有效,但是当我在列表框中更改我的选择时,它并没有计算出新的更改 为什么?
function jumlah(n){
var nilai = 0;
for( var i = 1; i<=n; i++ )
{
var a = document.getElementById("inh["+i+"]");
if(a.value != "")
{
nilai = nilai + parseInt(a.value);
}
}
//alert(n);
document.getElementById("txtjumlah").value = nilai;
//alert(nilai);
}
这是LISTBOX:
<select name="inh[<?php echo $no; ?>]" id="inh[<?php echo $no; ?>]" onchange="jumlah(<?php echo $count; ?>);">
<option value="">--Pilih--</option>
<option value="1" <?php if($datatampil['dosis_inh_perhari']==1) echo 'selected'; ?>>1 tablet</option>
<option value="2" <?php if($datatampil['dosis_inh_perhari']==2) echo 'selected'; ?>>2 tablet</option>
<option value="3" <?php if($datatampil['dosis_inh_perhari']==3) echo 'selected'; ?>>3 tablet</option>
</select>
这是输出计算数据的文本:
<input type="text" name="txtjumlah" id="txtjumlah" value="" readonly="readonly" style="width:30px;" />
谢谢你的帮助:))