jquery实现图片放大点击切换

 

   
  

 
 
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*{
margin: 0;
padding:0;
}
li{
 list-style: none;
}
.boss{
 position:relative;
 width: 350px;
}
.bigimg{
 width: 350px;
 border: 1px solid #ccc;
 height: 350px;
 position: relative;
}
#mask{
 width: 150px;
 height: 150px;
 background: rgba(255,255,255,0.5);
 position: absolute;
 top: 0;
 left: 0;
 border:1px solid #ccc;
 cursor: pointer;
}

.xia{
 clear:both;
 margin-top:5px;
 width:352px;
}
.xia .prev{
 float:left;
 margin-right:4px;
}
.xia .next{
 float:right;
}
.xia .prev,.xia .next{
 display:block;
 text-align:center;
 width:10px;
 height:54px; 
 line-height:54px;
 border:1px solid #CCC;
 background:#EBEBEB;
 cursor:pointer;
 text-decoration:none;
}
.xia .items{
 float:left;
 position:relative;
 width:322px;
 height:56px;
 overflow:hidden;
}
.xia .items ul{
 position:absolute;
 height:56px;
}
.xia .items ul li{
 float:left;
 width:64px;
 text-align:center;
}
 .xia .items ul li img{
 border:1px solid #CCC;
 padding:2px;
 width:50px;
 height:50px;
}
.xia .items ul li img:hover{
 border:2px solid #FF6600;
 padding:1px;
} 
.zoom{
 width: 350px;
 height: 410px;
 border:1px solid #ccc;
 position: absolute;
 top: 0;
 right: -360px;
 overflow: hidden;
 display: none;
}

var $spic=$("#spic");
var $mask=$("#mask");
var $bigimg=$(".bigimg");
var $bpic=$("#bpic");
$(".items img").on("mouseover",function(){
 
 $spic.attr("src",$(this).attr("src"));//鼠标滑过切换
 $bpic.attr("src",$(this).attr("src"));

});

var l=$bigimg.eq(0).offset().left;
var t=$bigimg.eq(0).offset().top;
var width2=$mask.outerWidth()/2;
var height1=$mask.outerHeight()/2;

var maxl=$bigimg.width()-$mask.outerWidth();
var maxt=$bigimg.height()-$mask.outerHeight();

var bili=$bpic.width()/$spic.width();

$bigimg.mouseover(function(e){
 var maskl=e.clientX-l-width2,maskt=e.clientY-t-height1;
 if(maskl<0) maskl=0;
 if(maskt<0) maskt=0;
 if(maskl>maxl)maskl=maxl;
 if(maskt>maxt)maskt=maxt;

 $mask.css({"left":maskl,"top":maskt});

 $(".zoom").show();

 $bpic.css({"margin-left":-maskl*bili,"margin-top":-maskt*bili});
});


var marginLeft=0
$(".next").click(function(){

 marginLeft=marginLeft-63.5;
 if(marginLeft<-254) marginLeft=-254;

 $(".items ul").css({"margin-left":marginLeft})
})
$(".prev").click(function(){

 marginLeft=marginLeft+63;
 if(marginLeft>0) marginLeft=0;

 $(".items ul").css({"margin-left":marginLeft})
});