HTML代码：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>表格隔行换色</title> <script> window.onload = function() { //1.获取表格 var tblEle = document.getElementById("tbl"); //2.获取表格中tbody里面的行数(长度) var len = tblEle.tBodies[0].rows.length; //3.对tbody里面的行进行遍历 for(var i = 0; i < len; i++) { if(i % 2 == 0) { //4.对偶数行设置背景颜色 tblEle.tBodies[0].rows[i].style.backgroundColor = "blue"; } else { //5.对奇数行设置背景颜色 tblEle.tBodies[0].rows[i].style.backgroundColor = "gold"; } } } </script> </head> <body> <table border="1" width="500" height="50" align="center" id="tbl"> <thead> <tr> <th>编号</th> <th>姓名</th> <th>年龄</th> </tr> </thead> <tbody> <tr> <td>1</td> <td>张三</td> <td>22</td> </tr> <tr> <td>2</td> <td>李四</td> <td>25</td> </tr> <tr> <td>3</td> <td>王五</td> <td>27</td> </tr> <tr> <td>4</td> <td>小明</td> <td>29</td> </tr> <tr> <td>5</td> <td>小红</td> <td>30</td> </tr> <tr> <td>6</td> <td>小刚</td> <td>20</td> </tr> </tbody> </table> </body> </html>
效果：
表格高亮显示：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>表格隔行换色</title> <script> function changeColor(id, flag) { if(flag == "over") { document.getElementById(id).style.backgroundColor = "red"; } else if(flag == "out") { document.getElementById(id).style.backgroundColor = "yellow"; } } </script> </head> <body> <table border="1" width="500" height="50" align="center"> <thead> <tr> <th>编号</th> <th>姓名</th> <th>年龄</th> </tr> </thead> <tbody> <tr onmouseover="changeColor(‘tr1‘,‘over‘)" id="tr1" onmouseout="changeColor(‘tr1‘,‘out‘)"> <td>1</td> <td>张三</td> <td>22</td> </tr> <tr onmouseover="changeColor(‘tr2‘,‘over‘)" id="tr2" onmouseout="changeColor(‘tr2‘,‘out‘)"> <td>2</td> <td>李四</td> <td>25</td> </tr> <tr onmouseover="changeColor(‘tr3‘,‘over‘)" id="tr3" onmouseout="changeColor(‘tr3‘,‘out‘)"> <td>3</td> <td>王五</td> <td>27</td> </tr> <tr onmouseover="changeColor(‘tr4‘,‘over‘)" id="tr4" onmouseout="changeColor(‘tr4‘,‘out‘)"> <td>4</td> <td>小明</td> <td>29</td> </tr> <tr onmouseover="changeColor(‘tr5‘,‘over‘)" id="tr5" onmouseout="changeColor(‘tr5‘,‘out‘)"> <td>5</td> <td>小红</td> <td>30</td> </tr> <tr onmouseover="changeColor(‘tr6‘,‘over‘)" id="tr6" onmouseout="changeColor(‘tr6‘,‘out‘)"> <td>6</td> <td>小刚</td> <td>20</td> </tr> </tbody> </table> </body> </html>
效果：
鼠标移到上面变成红色，移开变成黄色，不移动时候没有颜色
