table 数值获取：
1.http://www.w3school.com.cn/jsref/dom_obj_all.asp
2.http://blog.csdn.net/xs_zgsc/article/details/8444695#
3.http://www.jb51.net/article/49780.htm
4.http://www.iteye.com/problems/81941
5.http://www.cnblogs.com/umlzhang/archive/2011/10/18/2216189.html
6.http://www.cnblogs.com/umlzhang/category/467501.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function getTableColumnValue(tableId, rowNumber, columnNumber) {
var tableRef = document.getElementById(tableId);
var elementRef = tableRef.rows[rowNumber].cells[columnNumber];
var elementValue = '';
if (elementRef.textContent) {
// Firefox
elementValue = elementRef.textContent;
}
else if (elementRef.innerText) {
// IE
elementValue = elementRef.innerText;
}
else {
// Default
elementValue = elementRef.innerHTML;
var regExp = /</?[^>]+>/gi;
elementValue = elementValue.replace(regExp, '');
}
//alert(elementValue);
return elementValue;
}
</script>
</head>
<body>
<table border="1" id="myTable">
<tr>
<td>aa</td>
<td>bb</td>
<td>cc</td>
</tr>
<tr>
<td>dd</td>
<td>ee</td>
<td>ff</td>
</tr>
<tr>
<td>gg</td>
<td>hh</td>
<td>ii</td>
</tr>
</table>
<input type="button" value="click" onclick="this.value=getTableColumnValue('mytable',1, 2);">
</body>
</html>