简单开心农场

<!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>打造自己的开心农场</title>
<style type="text/css">
div{
font-size:12px;
border:#999 1px solid;
padding:5px;
}
#bg{ /*控制页面背景*/
456px;
height:266px;
background-image:url(images/plowland.jpg);
}
img{ /*控制图片*/
position:absolute;
top:85px;
left:195px;
}
#seed{ /*控制播种按钮*/
background-image:url(images/btn_seed.png);
56px;
height:56px;
position:absolute;
top:229px;
left:49px;
cursor:hand;
}
#grow{ /*控制生长按钮*/
background-image:url(images/btn_grow.png);
56px;
height:56px;
position:absolute;
top:229px;
left:154px;
cursor:hand;
}
#bloom{ /*控制开花按钮*/
background-image:url(images/btn_bloom.png);
56px;
height:56px;
position:absolute;
top:229px;
left:259px;
cursor:hand;
}
#fruit{ /*控制结果按钮*/
background-image:url(images/btn_fruit.png);
56px;
height:56px;
position:absolute;
top:229px;
left:368px;
cursor:hand;
}
</style>
<script type="text/javascript" src="jquery-3.2.1.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#seed").bind("click",function(){
$("#temp").remove();
$("#bg").prepend("<span id='temp'><img src='images/seed.png'/></span>");
});
$("#grow").bind("click",function(){
$("#temp").remove();
$("#bg").append("<span id='temp'><img src='images/grow.png'/></span>");
});
$("#bloom").bind("click",function(){
$("#temp").replaceWith("<span id='temp'><img src='images/bloom.png'/></span>");
});
$("#fruit").bind("click",function(){
$("<span id='temp'><img src='images/fruit.png'/></span>").replaceAll("#temp");
});

})
</script>
</head>