<!DOCTYPE html><html> ???<head> ???????<meta charset="UTF-8"> ???????<title>使用JQ完成表格隔行换色</title> ???????<script src="js/jquery.min.js"></script> ???????<script> ???????????$(function() { ???????????????$("tbody tr:odd").css("background-color","aquamarine"); ???????????????$("tbody tr:even").css("background-color","bisque"); ???????????????var tb = $("tbody tr"); ???????????????var oldColor; ???????????????for(var i=0;i<tb.length;i++) { ???????????????????//alert(oldColor); ???????????????????$("tbody tr")[i].onmouseover = function() { ???????????????????????oldColor = this.style.backgroundColor; ???????????????????????this.style.backgroundColor = "yellow"; ???????????????????} ???????????????????$("tbody tr")[i].onmouseout = function() { ???????????????????????this.style.backgroundColor = oldColor; ???????????????????} ???????????????} ???????????}); ???????</script> ???</head> ???<body> ???????<table id="tbl" border="1" border-collapse="collapse" align="center" cellspacing="0" cellpadding="5" width="400" height="20"> ???????????<thead> ???????????????<tr> ???????????????????<th>编号</th><th>姓名</th><th>年龄</th> ???????????????</tr> ???????????</thead> ???????????<tbody> ???????????????<tr> ???????????????????<td>1</td><td>张三</td><td>12</td> ???????????????</tr> ???????????????<tr> ???????????????????<td>2</td><td>李四</td><td>22</td> ???????????????</tr> ???????????????<tr> ???????????????????<td>3</td><td>王五</td><td>13</td> ???????????????</tr> ???????????????<tr> ???????????????????<td>4</td><td>马六</td><td>14</td> ???????????????</tr> ???????????????<tr> ???????????????????<td>5</td><td>伍六七</td><td>17</td> ???????????????</tr> ???????????????<tr> ???????????????????<td>6</td><td>梅花十三</td><td>17</td> ???????????????</tr> ???????????</tbody> ???????</table> ???</body></html>疑问：为什么this.style.backgroundColor = oldColor中的this不能用$("tbody tr")[i]代替？？
JQuery案例一：实现表格隔行换色
原文地址：https://www.cnblogs.com/keep-calm/p/9568651.html