在文本框中添加值

时间:2014-01-28 12:07:40

标签: javascript php html mysql

正如你所看到的那样,我在一个表上过滤的(总)文本框中已有一个值...如果我在(得分)文本框上键入一个数字,它将自动添加总数的当前值(文本框)...任何人都可以帮我解决我的代码错误,因为它不能正常工作......不会计算。

html代码:

<form id="frm" name="frm" />
<table>
<tr>
<td>
Name: <br />
<input type="text" name="name" value="<?php if(empty($name[0])){$name[0] = array(NULL);}else{echo $name[0];} ?>" readonly /> <br />
</td>
<td>
Score 1: <br />
<input type="text" name="optA" value="" onkeypress="return isnumeric(event)" onchange="optTotal()" /> <br />
</td>
<td>
Score 2: <br />
<input type="text" name="optB" value="" onkeypress="return isnumeric(event)" onchange="optTotal()" /> <br />
</td>
<td>
Score 3: <br />
<input type="text" name="optC" value="" onkeypress="return isnumeric(event)" onchange="optTotal()" /> <br />
</td>
<td>
Score 4: <br />
<input type="text" name="optD" value="" onkeypress="return isnumeric(event)" onchange="optTotal()" /> <br />
</td>
<td>
Total: <br />
<input type="text" name="totals" value="<?php if(empty($total[0])){$total[0] = array(NULL);}else{echo $total[0];} ?>" readonly onKeyUp="optTotal()" /> <br />
</td>
</form>

要计算的脚本代码:

<script>
function optTotal() {
        var a1 = document.forms[0].optA;
        var b1 = document.forms[0].optB;
        var c1 = document.forms[0].optC;
        var d1 = document.forms[0].optD;
        var xtotal = document.forms[0].totals;
        if (a1.value && a1.value != "")
            a1 = parseFloat(a1.value);
        else
            a1 = 0;

        if (b1.value && b1.value != "")
            b1 = parseFloat(b1.value);
        else
            b1 = 0;

        if (c1.value && c1.value != "")
            c1 = parseFloat(c1.value);
        else
            c1 = 0;

        if (d1.value && d1.value != "")
            d1 = parseFloat(d1.value);
        else
            d1 = 0;
        if (xtotal.value && xtotal.value != "")
            xtotal = parseFloat(xtotal.value);
        else
            xtotal = 0;

        var total = a1 + b1 + c1 + d1 + xtotal;
        document.forms[0].total.value = total;
      }
</script>

3 个答案:

答案 0 :(得分:0)

试试这个

set id for total input e.g TOTAL
document.getElementById('TOTAL').setAttribute('value',total)

或将此行total更改为totals

document.forms[0].totals.value = total

答案 1 :(得分:0)

脚本JS中存在错误:

不是:

document.forms[0].total.value = total;

可是:

document.forms[0].totals.value = total;

答案 2 :(得分:-1)

1确保您的“isnumeric”函数正确运行且可以访问,因此它不会中止脚本。

2您的“总计”名称不正确:

document.forms[0].total.value = total;

将其更改为:

document.forms[0].totals.value = total;

3使用浏览器控制台查看错误!