实例讲解JS计算表格每行的和与总和代码
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<title>IT知道网_ww.itwis.com--javascript计算每行的和与总和（QTY，PRICE，TOTAL，合计）</title>
</head>
<body>
<table width="760" border="0" cellspacing="1" cellpadding="0" id="tlist">
<tr name="fno" size=12 maxlength=12> </td>
<td><input type="text" name="fdesc" size=32> </td>
<td><input type="text" name="fqty" size=7 maxlength=7 value='0' onchange='chtotal(this);'> </td>
<td><input type="text" name="fprice" size=6 maxlength=6 value='0' onchange='chtotal(this);'> </td>
<td><input type="text" name="finners" size=4 maxlength=4> </td>
<td><input type="text" name="fouters" size=4 maxlength=4> </td>
<td><input type="text" name="ftotal" size=8 readonly value='0'> </td>
<td><input type="text" name="fremarks" size=20 maxlength=100> </td>
<td><input type="button" value="删除" name='del' onclick="delrecord(this);"> </td>
</tr>
<tr value="增加条目" onclick="AddRecord();"> </td>
</tr>
</table>
<script>
function AddRecord()
{
var row = tlist.insertRow(tlist.rows.length-2);
row.className='tit3';
var i = row.rowIndex;
var col = row.insertCell(0);
col.innerHTML = " <input type='text' name='fno' size=12 maxlength=12>";
col = row.insertCell(1);
col.innerHTML = " <input type='text' name='fdesc' size=32 maxlength=100>";
col = row.insertCell(2);
col.innerHTML = " <input type='text' name='fqty' size=7 maxlength=7 value='0' onchange='chtotal(this);'>";
col = row.insertCell(3);
col.innerHTML = " <input type='text' name='fprice' size=6 maxlength=6 value='0' onchange='chtotal(this);'>";
col = row.insertCell(4);
col.innerHTML = " <input type='text' name='finners' size=4 maxlength=4>";
col = row.insertCell(5);
col.innerHTML = " <input type='text' name='fouters' size=4 maxlength=4>";
col = row.insertCell(6);
col.innerHTML = " <input type='text' name='ftotal' size=8 readonly value='0'>";
col = row.insertCell(7);
col.innerHTML = " <input type='text' name='fremarks' size=20 maxlength=100>";
col = row.insertCell(8);
col.innerHTML = " <input type='button' value='删除' name='del' onclick='delrecord(this);'>";
}
function chtotal(e)
{
var obj=e.parentNode.parentNode;
var id=parseInt(obj.rowIndex)-1;
var fqty=document.getElementsByName("fqty")[id];
var fprice=document.getElementsByName("fprice")[id];
var ftotal=document.getElementsByName("ftotal")[id];
var delbutton=document.getElementsByName("del");
var znum= document.getElementById("znum");
var newzum=0;
ftotal.value = fqty.value * fprice.value;
for(var j=0;j <delbutton.length;j++)
{
newzum+=parseFloat(document.getElementsByName("ftotal")[j].value);
}
znum.innerHTML =newzum;
}
function delrecord(obj)
{
obj.parentNode.parentNode.parentNode.removeChild(obj.parentNode.parentNode);
var delbutton=document.getElementsByName("del");
var newzum=0;
for(var j=0;j <delbutton.length;j++)
{
newzum+=parseFloat(document.getElementsByName("ftotal")[j].value);
}
znum.innerHTML =newzum;
}
</script>
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