jquery 放大图片

<!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>jquery 图片放大镜 图片类似放大镜展示鼠标滑过小图异步加载中图、大图</title>
</head>

<body>
<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
body{line-height:180%;font-size:12px;}

/* preview style */
.preview{width:500px;}
/* smallImg */
.smallImg{position:relative;height:360px; padding:26px 5px; width:72px; overflow:hidden;float:left;}
.scrollbutton{width:45px; height:10px; overflow:hidden; position:absolute; left:17px; cursor:pointer;background:url(images/zoom.gif) no-repeat;}
.scrollbutton.smallImgUp{background-position:0 0; top:8px;}
.scrollbutton.smallImgDown{background-position:0 -11px; bottom:8px;}
.scrollbutton.smallImgUp.disabled{background-position:0 -22px;}
.scrollbutton.smallImgDown.disabled{background-position:0 -33px;}
#imageMenu {height:350px;overflow:hidden; margin-top:4px;}
#imageMenu li {height:82px; width:72px; overflow:hidden;}
#imageMenu li img{padding:1px;border:1px solid #E8E8E8; width:68px; height:68px;cursor:pointer;}
#imageMenu li#onlickImg img{border:1px solid #990000;}
/* bigImg */
.bigImg{position:relative;float:right;width:400px;height:400px;padding:5px;border:1px solid #E4E4E4;overflow:hidden;}
.bigImg #midimg{width:400px;height:400px;}
.bigImg #winSelector{width:235px;height:210px;}
#winSelector{position:absolute;cursor:crosshair;filter:alpha(opacity=15);-moz-opacity:0.15;opacity:0.15;background-color:#000;border:1px solid #fff;}
/* bigView */
#bigView{position:absolute;border: 1px solid black;overflow: hidden;width:260px;height:295.652px;top:300px;left:540px;z-index:999;}
#bigView img{position:absolute;}
</style>

<div class="preview" style="float:left;">
        <div class="smallImg">
            <div class="scrollbutton smallImgUp disabled"></div>
            <div id="imageMenu">
                <ul>
                    <li id="onlickImg"><img src="small/01.jpg" width="68" height="68" alt="洋妞"/></li>
                    <li><img src="small/02.jpg" width="68" height="68" alt="洋妞"/></li>
                    <li><img src="small/03.jpg" width="68" height="68" alt="洋妞"/></li>
                    <li><img src="small/04.jpg" width="68" height="68" alt="洋妞"/></li>
                    <li><img src="small/05.jpg" width="68" height="68" alt="洋妞"/></li>
                    <li><img src="small/06.jpg" width="68" height="68" alt="洋妞"/></li>
                </ul>
            </div>
            <div class="scrollbutton smallImgDown"></div>
        </div><!--smallImg end-->
    
        <div id="vertical" class="bigImg">
            <img src="mid/01.jpg" width="400" height="400" alt="天戈遥控飞机 AA02801 四通道遥控直升机 中天模型" id="midimg" />
            <div style="display:none;" id="winSelector"></div>
        </div><!--bigImg end-->
        
        <div id="bigView" style="display:none;"><img width="800" height="800" alt="" src="" /></div>
        
    </div><!--preview end-->
    
    <select style="float:left;margin:20px;display:inline;"><option>IE6 select 框遮罩测试</option></select>
<script type="text/javascript" src="jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
    
    // 图片上下滚动
    var count = $("#imageMenu li").length - 3; /* 显示 4 个 li标签内容 */
    var interval = $("#imageMenu li:first").height();
    var curIndex = 0;
    
    $('.scrollbutton').click(function(){
        if( $(this).hasClass('disabled') ) return false;
        
        if ($(this).hasClass('smallImgUp')) --curIndex;
        else ++curIndex;
        
        $('.scrollbutton').removeClass('disabled');
        if (curIndex == 0) $('.smallImgUp').addClass('disabled');
        if (curIndex == count-1) $('.smallImgDown').addClass('disabled');
        
        $("#imageMenu ul").stop(false, true).animate({"marginTop" : -curIndex*interval + "px"}, 600);
    });
    
    // 解决 ie6 select框 问题
    $.fn.decorateIframe = function(options) {
        if ($.browser.msie && $.browser.version < 7) {
            var opts = $.extend({}, $.fn.decorateIframe.defaults, options);
            $(this).each(function() {
                var $myThis = $(this);
                //创建一个IFRAME
                var divIframe = $("<iframe />");
                divIframe.attr("id", opts.iframeId);
                divIframe.css("position", "absolute");
                divIframe.css("display", "none");
                divIframe.css("display", "block");
                divIframe.css("z-index", opts.iframeZIndex);
                divIframe.css("border");
                divIframe.css("top", "0");
                divIframe.css("left", "0");
                if (opts.width == 0) {
                    divIframe.css("width", $myThis.width() + parseInt($myThis.css("padding")) * 2 + "px");
                }
                if (opts.height == 0) {
                    divIframe.css("height", $myThis.height() + parseInt($myThis.css("padding")) * 2 + "px");
                }
                divIframe.css("filter", "mask(color=#fff)");
                $myThis.append(divIframe);
            });
        }
    }
    $.fn.decorateIframe.defaults = {
        iframeId: "decorateIframe1",
        iframeZIndex: -1,
        width: 0,
        height: 0
    }
    //放大镜视窗
    $("#bigView").decorateIframe();

//点击到中图
    var midChangeHandler = null;
    
    $("#imageMenu li img").bind("mouseover", function(){
        if ($(this).attr("id") != "onlickImg") {
            midChange($(this).attr("src").replace("small", "mid"));
            $("#imageMenu li").removeAttr("id");
            $(this).parent().attr("id", "onlickImg");
        }
    }).bind("mouseover", function(){
        if ($(this).attr("id") != "onlickImg") {
            window.clearTimeout(midChangeHandler);
            midChange($(this).attr("src").replace("small", "mid"));
            $(this).css({ "border": "1px solid #990000" });
        }
    }).bind("mouseout", function(){
        if($(this).attr("id") != "onlickImg"){
            $(this).removeAttr("style");
            midChangeHandler = window.setTimeout(function(){
                midChange($("#onlickImg img").attr("src").replace("small", "mid"));
            }, 1000);
        }
    });

function midChange(src) {
        $("#midimg").attr("src", src).load(function() {
            changeViewImg();
        });
    }

//大视窗看图
    function mouseover(e) {
        if ($("#winSelector").css("display") == "none") {
            $("#winSelector,#bigView").show();
        }

$("#winSelector").css(fixedPosition(e));
        e.stopPropagation();
    }

function mouseOut(e) {
        if ($("#winSelector").css("display") != "none") {
            $("#winSelector,#bigView").hide();
        }
        e.stopPropagation();
    }

$("#midimg").mouseover(mouseover); //中图事件
    $("#midimg,#winSelector").mousemove(mouseover).mouseout(mouseOut); //选择器事件

var $divWidth = $("#winSelector").width(); //选择器宽度
    var $divHeight = $("#winSelector").height(); //选择器高度
    var $imgWidth = $("#midimg").width(); //中图宽度
    var $imgHeight = $("#midimg").height(); //中图高度
    var $viewImgWidth = $viewImgHeight = $height = null; //IE加载后才能得到 大图宽度 大图高度 大图视窗高度

function changeViewImg() {
        $("#bigView img").attr("src", $("#midimg").attr("src").replace("mid", "big"));
    }

changeViewImg();

$("#bigView").scrollLeft(0).scrollTop(0);
    function fixedPosition(e) {
        if (e == null) {
            return;
        }
        var $imgLeft = $("#midimg").offset().left; //中图左边距
        var $imgTop = $("#midimg").offset().top; //中图上边距
        X = e.pageX - $imgLeft - $divWidth / 2; //selector顶点坐标 X
        Y = e.pageY - $imgTop - $divHeight / 2; //selector顶点坐标 Y
        X = X < 0 ? 0 : X;
        Y = Y < 0 ? 0 : Y;
        X = X + $divWidth > $imgWidth ? $imgWidth - $divWidth : X;
        Y = Y + $divHeight > $imgHeight ? $imgHeight - $divHeight : Y;

if ($viewImgWidth == null) {
            $viewImgWidth = $("#bigView img").outerWidth();
            $viewImgHeight = $("#bigView img").height();
            if ($viewImgWidth < 200 || $viewImgHeight < 200) {
                $viewImgWidth = $viewImgHeight = 800;
            }
            $height = $divHeight * $viewImgHeight / $imgHeight;
            $("#bigView").width($divWidth * $viewImgWidth / $imgWidth);
            $("#bigView").height($height);
        }

var scrollX = X * $viewImgWidth / $imgWidth;
        var scrollY = Y * $viewImgHeight / $imgHeight;
        $("#bigView img").css({ "left": scrollX * -1, "top": scrollY * -1 });
        $("#bigView").css({ "top": 0, "left": $(".preview").offset().left + $(".preview").width() + 15 });

return { left: X, top: Y };
    }

});
</script>
</body>
</html>

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