<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD> <BODY>
<table id="tb">
<tr>
<td style="100px"> </td>
<td scope="120px"> </td>
</tr>
<tr>
<td style="100px"> </td>
<td scope="120px"> </td>
</tr>
</table>
<script>
for(var i = 0; i < document.getElementsByTagName('td').length; i ++)
{
alert(document.getElementsByTagName('td')[i].offsetWidth);
}
</script>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD> <BODY>
<table id="tb">
<tr>
<td style="100px"> </td>
<td scope="120px"> </td>
</tr>
<tr>
<td style="100px"> </td>
<td scope="120px"> </td>
</tr>
</table>
<script>
for(var i = 0; i < document.getElementsByTagName('td').length; i ++)
{
alert(document.getElementsByTagName('td')[i].offsetWidth);
}
</script>
</BODY>
</HTML>
<!--
var CellWidth; for(var i = 0; i < document.getElementsByTagName('td').length; i ++)
{
CellWidth=document.getElementsByTagName('td')[i];
document.write(CellWidth.offsetWidth);
}
//-->
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD> <BODY>
<table id="tb">
<tr>
<td style="100px"> </td>
<td style="120px"> </td>
</tr>
<tr>
<td style="100px"> </td>
<td style="120px"> </td> //要用scope得到的就是0,scope是设置或获取对象的信息所应用的标格单元格组
</tr>
</table>
<script>
for(var i = 0; i < document.getElementsByTagName('td').length; i ++)
{
alert(document.getElementsByTagName('td')[i].clientWidth-2);
}
</script>
</BODY>
</HTML>
document.getElementById('td0').style.width="2222"; <table style="position: relative">
<tr>
<td id="td0">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
<td style="width: 100px">
</td>
</tr>
</table>为什么不能定义上值?
你的宽度设置的值超出了范围,你显示器的屏幕都没那么宽哈。