【转】类似淘宝放大镜代码 -

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【转】类似淘宝放大镜代码

博客分类：

JS Jquery

JS Jquery

两种方法实现，第一种js，第二种jquery

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
body{padding:0px;margin:0px;background:#aaaaaa;}
#small_pic{
margin:10px 0 0 10px;width:375px;height:275px;cursor:crosshair;
}
#zoom{
border:1px solid red;width:120px;height:120px;background:#FFFFFF;position:absolute;top:20px;left:20px;
opacity:0.5;filter:alpha(opacity=50);
display:none;
}
#big_pic{
width:240px;height:240px;border:1px solid red;position:absolute;top:10px;left:500px;overflow:hidden;display:none;
}
</style>
<script type="text/javascript">
window.onload = function(){
var small_pic = document.getElementById('small_pic');
var big_pic = document.getElementById('big_pic');
var zoomer = document.getElementById('zoom');
var pic2 =document.getElementById('pic2');
//移动跟随
 
small_pic.onmousemove = mouseMove;
function mouseMove(ev){
    ev = ev || window.event;
    var l = ev.clientX-small_pic.offsetLeft-zoomer.offsetWidth/2;
    var h = ev.clientY-small_pic.offsetTop-zoomer.offsetHeight/2;
    if(l<0){l=0;}
    else if(l>small_pic.offsetWidth-zoomer.offsetWidth){l=small_pic.offsetWidth-zoomer.offsetWidth+1;}
    if(h<0){h=0;}
    else if(h>small_pic.offsetHeight-zoomer.offsetHeight){h=small_pic.offsetHeight-zoomer.offsetHeight+1;}
 
    document.getElementById("zoom").style.left = l+small_pic.offsetLeft+"px";
    document.getElementById("zoom").style.top = h+small_pic.offsetTop+"px";
     
    var percent = big_pic.clientWidth/zoomer.clientWidth;
    pic2.style.left = big_pic.style.left-percent*l+'px';
    pic2.style.top = big_pic.style.top-percent*h+'px';
}
 
small_pic.onmouseover = function(){
    zoomer.style.display = 'block';
    big_pic.style.display = 'block';
    mouseMove();
};
small_pic.onmouseout = function(){
    zoomer.style.display ='none';
    big_pic.style.display='none';
};
};
</script>
</head>
<body>
<div id="small_pic">
<img id="pic1" src="images/00001.jpg" style="width:375px;height:275px;border:1px solid #aaaaaa;">
<span id="zoom">
</span>
</div>
<div id="big_pic">
<img id="pic2" src="images/00001.jpg" style="width:750px;height:550px;position:absolute;">
</div>
</body>
</html>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
		<title>Untitled Document</title>
	</head>
	<style>
		*{  
    padding:0px;  
    margin:0px;  
    border:0px;}  
	.all{  
	    margin:0 auto;  
	    width:960px;  
	    }  
	.big{  
	    float:left;  
	    width:160px;  
	    height:160px;  
	    border:2px solid #CCC;  
	    padding:3px;  
	    margin-top:100px;}  
	.big .small{  
	    width:50px;  
	    height:50px;  
	    position:absolute;  
	    top:0px;  
	    left:300px;  
	    background:#CFF;  
	    opacity:0.75;  
	    display:none;}  
	.big .show{  
	    width:275px;  
	    height:150px;  
	    padding:3px;  
	    position:absolute;  
	    top:100px;  
	    left:500px;  
	    display:none;  
	    background:url(images/00001.jpg) no-repeat left top;  
	    border:1px solid #666;} 
		
	</style>
	<script src="jquery-1.7.2.js" type="text/javascript"></script>
	<script>
		var topset=0;  
    	var leftset=0;  
	    $(document).ready(function(e) {  
	        $(".big").mouseleave(function(){  
	            $(".small").css({"top":LTY,"left":LTX,"display":"none"});  
	            $(".show").css("display","none");  
	        }).mousemove(function(e){  
	            topset=$(this).offset().top;  
	            leftset=$(this).offset().left;  
	            if(e.pageX<185)  
	                LTX=160;  
	            else if(e.pageX>301)  
	                LTX=276;  
	            else  
	                LTX=e.pageX-25;  
	            if(e.pageY<125)  
	                LTY=100;  
	            else if(e.pageY>241)  
	                LTY=221;  
	            else  
	                LTY=e.pageY-25;  
	            $(".small").css({"top":LTY,"left":LTX,"display":"block"});  
	              
	            position_x="-"+Math.round((LTX-160)/160*550)+"px";  
	            position_y="-"+Math.round((LTY-100)/160*375)+"px";  
	            pl=position_x+" "+position_y;  
	            $(".show").css({"display":"block","background-position":pl});  
	        });  
	    });  
		
	</script>
	<body>  
    <div class="all">  
        <div class="big">  
            [img]images/00001.jpg" width="160px;" height="160px[/img]  
            <div class="small"></div>  
            <div class="show"></div>  
        </div>  
    </div>  
    </body>
</html>

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