【温故而知新-Javascript】图片效果（图像震动效果、闪烁效果、自动切换图像）

1.当鼠标指针经过图像时图像震动效果

<!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>当鼠标指针经过图像时图像震动效果</title>
<style type="text/css">
.zhendimage{ position:relative; }
</style>
<script type="application/javascript" >
var rector =3;
var stopit = 0;
var a=1;
var zhend;
function init(which)
{
    stopit =0;
    zhend = which;
    zhend.style.left =0;
    zhend.style.top =0;
}
function rattleimage()
{
    if(stopit==1)
    {
        return;
    }    
    if(a==1)
    {
        zhend.style.top = parseInt(zhend.style.top)+rector+"px";
    }
    else if(a==2)
    {
        zhend.style.left = parseInt(zhend.style.left)+rector+"px";
    }
    else if(a==3)
    {
        zhend.style.top = parseInt(zhend.style.top)-rector+"px";
    }
    else 
    {
        zhend.style.left = parseInt(zhend.style.left)-rector+"px";
    }
    if(a<4)a++;    else a =1;
    setTimeout("rattleimage()",50);
}

function stoprattle(which)
{
    stopit = 1;
    which.style.left =0;    
    which.style.top =0;        
}
</script>
</head>

<body>
<div>
<img class="zhendimage" onmousemove="init(this);rattleimage();"
onmouseout="stoprattle(this);"  src="http://images.cnblogs.com/likecs_com/yc-755909659/559257/o_ycimg002.png" /></div>
</body>
</html>

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