我目前正在使用这个javascript和PHP代码
<script>
function add(total)
{
form2.thetotal.value = document.forms["form1" + total].total.value;
}
</script>
<form name="form2">
<table width="800" border="0" cellspacing="0" cellpadding="10" style="position:fixed; z-index:-999; background-color:#FFF;">
<tr bgcolor="#eeeeee">
<td> </td>
<td colspan="2" width="50%"><strong>Total: </strong><input type="text" name="thetotal" id="thetotal" size="20" value="0" /></td>
<td colspan="2" width="50%"><strong>VAT:</strong> </td>
</tr>
<tr bgcolor="#eeeeee">
<td width="5%"> </td>
<td width="20%"><strong>Invoice Number</strong></td>
<td width="35%"><strong>Company</strong></td>
<td width="20%"><strong>Date</strong></td>
<td width="20%"><strong>Total</strong></td>
</tr>
</table>
</form>
<form name="form1">
<table width="800" border="0" cellspacing="0" cellpadding="10">
<?php
$sql="SELECT * from billing_pdf_archive order by invoice_number ASC ";
$rs=mysql_query($sql,$conn) or die(mysql_error());
while($result=mysql_fetch_array($rs))
{
$counter++;
$sql2="SELECT * from customer where sequence = '".$result["customer_sequence"]."' ";
$rs2=mysql_query($sql2,$conn) or die(mysql_error());
$result2=mysql_fetch_array($rs2);
$sql3="SELECT * from reseller where sequence = '".$result["reseller_sequence"]."' ";
$rs3=mysql_query($sql3,$conn) or die(mysql_error());
$result3=mysql_fetch_array($rs3);
if($result["customer_sequence"] != '0')
{
$company = $result2["company"];
}
elseif($result["reseller_sequence"] != '0')
{
$company = '<strong>Reseller: </strong>'.$result3["company"];
}
$total = $result["total"];
echo '<tr>
<td width="5%"><input type="checkbox" name="check" id="check" onclick=''add('.$total.');'' /></td>
<td width="20%">'.$result["invoice_number"].'</td>
<td width="35%">'.$company.'</td>
<td width="20%">'.$result["datetime"].'</td>
<td width="20%">£'.$result["total"].'</td>
</tr>';
}
?>
</table>
</form>
所以你可以看到它是从MySQL数据库中选择，我试图使它这样做，当其中一个复选框被选中时，它将总数添加到"thetotal"文本字段(在表单2中)，但它只是离开该框为零-我能做什么有什么想法吗?
您没有指定表单1的总字段，那么它会引发javascript错误，它不会工作。检查一下
<script>
function add(total)
{
form2.thetotal.value = total + parseFloat(document.form1.formtotal.value);
}
</script>
<form name="form1">
<!-- replace field name formtotal with anything that you want-->
<!-- replace field value with anything that you get from your mysql result-->
<input type="text" name="formtotal" id="formtotal" value="10" />
</form>
你可以这样做(假设total是int而不是float):
<script>
function add(total, this_chk_bx)
{
//(if its float, use `parseFloat` instead of `parseInt`)
if(this_chk_bx.checked==true){
//add if its checked
var tot_1 = parseInt(form2.thetotal.value);
form2.thetotal.value = tot_1+parseInt(total);
}
else{
//subtract if its unchecked
}
}
</script>
.
在你的php中，你必须像这样发送复选框:onclick=''add('.$total.', this);''
.