<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<script type="text/javascript">for(var i=1;i<6;i++)
{
document.write("<table width=300 border=1>");
document.write("<tr>");
document.write("<td>");
var a=Math.floor(Math.random()*100+1);
var b=Math.floor(Math.random()*100+1);
document.write(a+"加"+b+"=");
function check()
{
var x=document.getElementsByName("text"+i+"")[0];
var c=x.value;
if(a+b==c)
{
document.write("正确");
}
else
{
document.write("错误");
}
}
document.write("<input name='text"+i+"' type='text' size='5' />");
document.write("<input type='button' name='button' value='查看对错' onclick='return check();' />");
document.write("</td>");
document.write("</tr>");
document.write("</table>");
}
</script>
<script type="text/javascript">
for(var i=0;i<5;i++)
{
document.write("<table width=300 border=1>");
document.write("<tr>");
document.write("<td>");
var a1=Math.floor(Math.random()*100+1);
var b1=Math.floor(Math.random()*100+1);
while(b1>a1)
{
var a1=Math.floor(Math.random()*100+1);
var b1=Math.floor(Math.random()*100+1);
}
document.write(a1+"减"+b1+"=");
function check2()
{
var x1=document.getElementsByName("text2")[0];
var c1=x1.value;
if(a1-b1==c1)
{
document.write("正确");
}
else
{
document.write("错误");
}
}
document.write("<input name='text2' type='text' size='5' />");
document.write ("<input type='button' name='button2' value='查看对错' onclick='return check2();' />");
document.write ("</td>");
document.write ("</tr>");
document.write ("</table>");
}
</script>
</tr>
</table></body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<script type="text/javascript">for(var i=1;i<6;i++)
{
document.write("<table width=300 border=1>");
document.write("<tr>");
document.write("<td>");
var a=Math.floor(Math.random()*100+1);
var b=Math.floor(Math.random()*100+1);
document.write(a+"加"+b+"=");
function check()
{
var x=document.getElementsByName("text"+i+"")[0];
var c=x.value;
if(a+b==c)
{
document.write("正确");
}
else
{
document.write("错误");
}
}
document.write("<input name='text"+i+"' type='text' size='5' />");
document.write("<input type='button' name='button' value='查看对错' onclick='return check();' />");
document.write("</td>");
document.write("</tr>");
document.write("</table>");
}
</script>
<script type="text/javascript">
for(var i=0;i<5;i++)
{
document.write("<table width=300 border=1>");
document.write("<tr>");
document.write("<td>");
var a1=Math.floor(Math.random()*100+1);
var b1=Math.floor(Math.random()*100+1);
while(b1>a1)
{
var a1=Math.floor(Math.random()*100+1);
var b1=Math.floor(Math.random()*100+1);
}
document.write(a1+"减"+b1+"=");
function check2()
{
var x1=document.getElementsByName("text2")[0];
var c1=x1.value;
if(a1-b1==c1)
{
document.write("正确");
}
else
{
document.write("错误");
}
}
document.write("<input name='text2' type='text' size='5' />");
document.write ("<input type='button' name='button2' value='查看对错' onclick='return check2();' />");
document.write ("</td>");
document.write ("</tr>");
document.write ("</table>");
}
</script>
</tr>
</table></body>
</html>
1、c返回的类型是string,因此需要parseInt转换;
2、最大的问题,循环后,a、b值都是最后一次循环的值,因此除了最后一个加法等式,其余永远的都不对
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<script type="text/javascript">for(var i=1;i<6;i++)
{
document.write("<table width=300 border=1>");
document.write("<tr>");
document.write("<td>");var a=Math.floor(Math.random()*100+1);
var b=Math.floor(Math.random()*100+1);
document.write(a+"加"+b+"=")
document.write("<input name='text"+i+"' type='text' size='5' />");
document.write("<input type='button' name='button' value='查看对错' onclick='return check("+i+");' />");
document.write("</td>");
document.write("</tr>");
document.write("</table>");
}function check(i)
{
var x=document.getElementsByName("text"+i+"")[0];
var c=x.value;
if(a+b==c)
{
document.write("正确");
}
else
{
document.write("错误");
}
}
</script></body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
<style type="text/css">
table { float: left; }
td { height: 30px; }
</style> <script type="text/javascript">
function compute() {
var t1 = document.getElementById("table1");
var tds = t1.getElementsByTagName("td");
var btns = document.getElementsByName("btn");
for (var i = 0; i < tds.length; i++) {
var a = Math.floor(Math.random() * 100 + 1);
var b = Math.floor(Math.random() * 100 + 1);
t1.cells[i].innerText = a + "+" + b;
btns[i].onclick = function() {
var txts = document.getElementsByName("txt");
var btns = document.getElementsByName("btn");
for (var i = 0; i < txts.length; i++) {
if (btns[i] == this) {
if (txts[i].value == eval(t1.cells[i].innerText)) {
alert("正确");
}
else {
alert("错误");
}
}
}
}
}
}
</script></head>
<body onload="compute()">
<table id="table1" border="1">
<tr>
<td></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td></td>
</tr>
</table>
<table id="table2" border="1">
<tr>
<td>
<input type="text" name="txt" size="5" /><input type="button" name="btn" value="计算" />
</td>
</tr>
<tr>
<td>
<input type="text" name="txt" size="5" /><input type="button" name="btn" value="计算" />
</td>
</tr>
<tr>
<td>
<input type="text" name="txt" size="5" /><input type="button" name="btn" value="计算" />
</td>
</tr>
<tr>
<td>
<input type="text" name="txt" size="5" /><input type="button" name="btn" value="计算" />
</td>
</tr>
</table>
</body>
</html>