淘宝UED的相册展示效果图片放大镜_ued南找99 949-优快云博客

本文介绍了一种使用HTML、CSS及JavaScript实现的图片放大镜效果。通过鼠标悬停在小图上，可以显示一个放大的局部视图，帮助用户更清晰地查看图片细节。

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<!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>Untitled Document</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
<style>
body { font-size:12px; padding:0}
</style>
<script language="javascript">
pic={
href:"http://js.alixixi.com/UploadPic/2011-3/b.jpg",
boxSize:250,
width:1330,
height:2128,
creatImg:function(id){//创建图片
var width = $("#"+id).css("width");
$("#"+id).append("<img src='"+this.href+"' style='width:"+width+"'/>");
$("#"+id).append("<div id='bigImg'></div>");

var that = this;
$("#"+id).mousemove(function(e){
   var x = e.pageX-$(this).offset().left;
   var y = e.pageY-$(this).offset().top;
   if((x<parseInt(width) && x>0) && (y<that.height/that.multiple() && y>0)){
    $("#bigImg").fadeIn(200);
    that.creatBigImg(x,y);
   }else{
    $("#bigImg").fadeOut(200);
   }
});

},

multiple:function(id){//和实际图片的倍数关系
return this.width/parseInt($("#pic").css("width"));
},

bigBoxPost:function(x,y){//大图的坐标
return [x-this.boxSize/2,y-this.boxSize/2];
},

bigLoadPost:function(x,y){//大图的坐标
return [-(x*this.multiple()-this.boxSize/2),-(y*this.multiple()-this.boxSize/2)];
},

creatBigImg:function(x,y){
var that = this;
$("#bigImg").css({
   width:that.boxSize,
   height:that.boxSize,
   border:"#FFF 5px solid",
   position:"absolute",
   top:that.bigBoxPost(x,y)[1],
   left:that.bigBoxPost(x,y)[0],
   background:"url("+that.href+") no-repeat",
   backgroundPosition:that.bigLoadPost(x,y)[0]+"px "+that.bigLoadPost(x,y)[1]+"px"
})
}
}
$(document).ready(function(){
pic.creatImg("pic");
})
</script>
</head>
<body >
<div id="pic" style=" width:500px; position: relative; margin:100px;"></div>
</body >
</html>