课堂总结

图片自动和手动切换

<!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=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{
    margin:0px;
    padding:0px;
    font-family:"微软雅黑";}

    
#tuijian{
    width:940px;
    height:500px;
    background-repeat:no-repeat;
    margin:auto;
    }
.pages{
    line-height:500px;
    background-color:#000;
    background-position:center;
    background-repeat:no-repeat;
    opacity:0.4;
    width:30px;
    height:60px;
    }
#p1 {
    background-image:url(zuo.jpg);
    float:left;
    margin:180px 0px 0px 10px;}
#p2{
    background-image:url(you.jpg);
    float:right;
    margin:180px 10px 0px 0px;}
    
</style>
</head>

<body>

<div id="tuijian" style="background-image:url(E8Z311O60R7W.jpg)">
<div class="pages" id="p1" onclick="dodo(-1)"></div>
<div class="pages" id="p2" onclick="dodo(1)"></div>


</div>

</body>
</html>
<script type="text/javascript">
var jpg=new Array();
jpg[0]="url(1212.jpg)";
jpg[1]="url(1213.jpg)";
jpg[2]="url(1214.jpg)";
var tjimg=document.getElementById("tuijian");
var xb=0;
var n=0;
function huan()
{
    xb++;
    if(xb==jpg.length)
    {
        xb=0;
        
        }
        
        tjimg.style.backgroundImage=jpg[xb];
        if(n==0)
        {
            var id=window.setTimeout("huan()",3000);
            }
    }
function dodo(m)
{
      n=1;
      xb=xb+m;
      if(xb<0)
      {
          xb=jpg.length-1;}
          else if(xb>=jpg.length)
          {
              xb=0;
          }
    tjimg.style.backgroundImage=jpg[xb];
}
window.setTimeout("huan()",3000);
</script>

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同意按钮倒数十秒

<!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=utf-8" />
<title>无标题文档</title>
</head>

<body>
<form>
<input type="submit" id="t" value="同意（9）"  disabled="disabled" />
</form>
</body>
</html>
<script>
var n=10;
var a=document.getElementById("t");
function bian()
{
    n--;
    if(n==0)
    {
        a.removeAttribute("disabled");
        a.value="同意";
        return;
        
        }
    else
    {
        a.value="同意（"+n+"）";
        window.setTimeout("bian()",1000);
        }
    }
window.setTimeout("bian()",1000);
</script>

View Code

判断输入的对和错

<!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=utf-8" />
<title>无标题文档</title>
</head>

<body>
<form>
中华民国成立于哪一年？<input type="text" daan="1912年" value="" id="t1" name="t1" /><input type="button" onclick="check()" id="t2" name="t2" value="检查答案" />
</form>
</body>
</html>
<script>
function check()
{
    var a=document.getElementById("t1");
    var a1=a.value;
    var b=a.getAttribute("daan");
    if(a1==b)
    {
        alert("恭喜你答对了")}
        else
        {
            alert("笨蛋！")
            }    
}
</script>

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