版权声明: https://blog.csdn.net/eds124/article/details/85272019
</div>
</form>
</body>
</html>
<script type="text/javascript">
//记得放到最后,因为必须等表格呈现之后才可以改变样式颜色
table = document.getElementsByTagName('table'); //获取集合
for (i = 0; i < table[0].rows.length; i++) {//遍历
td = table[0].rows[i].cells[7];//取出td
if (td.textContent <= 0) {//判断是否大于0
td.style.backgroundColor = "red";//小于等于0变成红色
} else {
td.style.backgroundColor = "green";//否则变成绿色
}
}
</script>