新手请教

拿table的行、列循环啊
然后在把innerHTML加起来即可

解决方案 »

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<script javascript>
function sumoftable(){
var j = 0;
for(var i=0;i<=document.form1.table1.rows.length;i++)
{
j = j+document.form1.table1.rwos[i].value;
}
ta1.innerHtml=j;
}
</script>
<form name=form1 methode="post">
<table name="table1" id='table1">
<tr>
<td>
1
</td>
</tr>
<tr>
<td>
2
</td>
</tr>
</table>
<input type=button name="button1" value="clicked " onclick="javascript:sumoftable()">
<textarea name="textarea1" id="ta1"> </textarea>
没有调试过
自己调试一下,方法是这样的
可以参考一下下面我这个上次做的与这个有点像:
function addrow()
{
if(this.parent.main.table1.rows.length>19){
alert("you have already andded 20 rows sorry to you");
return false;
}
var j = 0;
for(var i=0;i<=this.parent.main.table1.rows.length;i++)
{
j = j+i;
}
//rowsvalue=rowsfor+rowsvalue;
var oRow1=this.parent.main.table1.insertRow(this.parent.main.table1.rows.length);
var cell1 = oRow1.insertCell(-1);
var cell2 = oRow1.insertCell(-1);
cell1.innerHTML = " "+this.parent.main.table1.rows.length+ "     ";
cell2.innerHTML = j+this.parent.main.table1.rows.length;
//rowsfor++;
//return rowsfor;
}</script>
<body>
<script javascript>
function sumoftable(){
var j = 0;
for(var i=0;i<document.all("table1").rows.length;i++)
{
j = j+ parseInt(document.all("table1").rows(i).cells(0).innerText);
}
document.all("ta1").innerHTML=j;
}
</script>
<form name=form1 methode="post">
<table name="table1" id="table1">
<tr>
<td>
1
</td>
</tr>
<tr>
<td>
2
</td>
</tr>
</table>
<input type=button name="button1" value="clicked " onclick="javascript:sumoftable()">
<textarea name="textarea1" id="ta1"> </textarea>
</body>
<body>
<script javascript>
function sumoftable(){
var j = 0;
for(var i=0;i<document.all("table1").rows.length;i++)
{
j = j+ parseInt(document.all("table1").rows(i).cells(0).innerText);
}
document.all("ta1").innerHTML=j;
}
</script>
<form name=form1 methode="post">
<table name="table1" id="table1">
<tr>
<td>
1
</td>
</tr>
<tr>
<td>
2
</td>
</tr>
</table>
<input type=button name="button1" value="clicked " onclick="javascript:sumoftable()">
<textarea name="textarea1" id="ta1"> </textarea>
</body>