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700)this.width=700;" style="max-width:700px;" title="点击查看原图" onclick="if(this.parentNode.tagName!='A') window.open('https://www.javascriptcn.com/attachment/1704/thread/14_1_21f0e677468da6a.png');" />代码如下：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>span实现的乘法表</title> <style type="text/css"> .wrap { width: 800px; margin: 20px auto; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; } span { padding: 3px; font-weight: 700; display: inline-block; line-height: 30px; border-bottom: 2px solid #000000; border-left: 2px solid #000000; width: 80px; cursor: pointer; } .last { margin-top: -2px; border-top: 2px solid #000000; border-right: 2px solid #000000; } .bg0 { background-color: yellow; } .bg1 { background-color: lawngreen; } .bg2 { background-color: lightblue; } .hover { background-color: #BB3BD9; } .only{ background-color: lightsalmon; } </style> </head> <body> <script> function multiplication(a) { var str = '<p class="wrap">'; for (var i = 1; i <= a; i++) { for (var j = 1; j <= i; j++) { var curstr = j + ' x ' + i + '= ' + i * j; j !== i ? str += '<span class="' + 'bg' + (i % 3) + '">' + curstr + '</span>' : str += '<span class="' + 'last bg' + (i % 3) + '">' + curstr + '</span>'; } } str += "</p>"; document.write(str); } i multiplication(9); var oSpans = document.getElementsByTagName("span"); for (var i = 0; i < oSpans.length; i++) { oSpans[i].onclick = function () { //alert("我是第 "+parseInt(this.innerHTML)+" 行"); alert(this.innerHTML + " 我在第 " + this.innerHTML.charAt(4) + " 行"); } oSpans[i].onmouseover = function () { //console.log(111); var num = this.innerHTML.charAt(4); //console.log(num); for (var j = 0; j < oSpans.length; j++) { if (oSpans[j].innerHTML.charAt(4) === num) { oSpans[j].classList.add("hover"); } } this.classList.add("only"); } oSpans[i].onmouseout = function () { var num = this.innerHTML.charAt(4); for (var j = 0; j < oSpans.length; j++) { if (oSpans[j].innerHTML.charAt(4) === num) { oSpans[j].classList.remove("hover"); } } this.classList.remove("only"); } } </script> </body> </html>更多相关内容：
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