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今日学习内容为:
1.文本域操作
<html> <head> <meta charset="utf-8"/> <title>JavaScript4</title> <script type="text/javascript" language="javascript"> function fun() { var max = 20; var curr = document.getElementById("note").value.length; if(curr < max) { document.getElementById("msg").innerHTML = "您可以输入" + (max - curr) + "个字"; document.getElementById("sub").disabled = false; } else { document.getElementById("msg").innerHTML = "<font color=\"red\">您的输入内容过长,请修改。</font>"; document.getElementById("sub").disabled = true; } } </script> </head> <body> <form action="javascript3.html" name="myform"> <textarea name="note" cols="30" rows="6" onkeydown="fun()" onkeyup="fun()"> </textarea> <br/> <span id="msg">您可以输入20个字</span> <input type="submit" name="sub"> </form> </body> </html>
2.表格操作
<html> <head> <title>JavaScript5</title> <script type="text/javascript" language="javascript"> function createTable() { document.write("<table border=\"1\">"); for(var i=1;i<=9;i++) { document.write("<tr>"); for(var j=1;j<i;j++) { document.write("<td>"+i+"*"+j+"="+(i*j)+"</td>"); } for(var j=1;j<9-i;j++) { document.write("<td> </td>") } document.write("</tr>"); } } </script> </head> <body> <input type="button" value="生成乘法口诀" onclick="createTable()"/> </body> </html>
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原文地址:http://www.cnblogs.com/pony1223/p/5582676.html