原生js放大镜效果代码（js放大镜功能）

本篇文章给大家谈谈原生js放大镜效果代码，以及js放大镜功能对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、jquery图片放大镜代码解析注释
• 2、javascript放大镜代码
• 3、急求个JS图片放大器，可以放大当前显示图层在鼠标指针附件区域，

jquery图片放大镜代码解析注释

(function($){//定义作用域

$.fn.imagezoom=function(options){/*自定义插件imageszoom，options代表形参（属性自定义）*/

var settings={

xzoom: 350, /*放大图的宽度(默认是 350)*/

yzoom: 350, /*放大图的高度(默认是 350)*/

offset: 10, /*离原图的距离(默认是 10)*/

position: "right", /*放大图的定位(默认是 "right")*/

preload:1

};

if(options){

$.extend(settings,options);

}

var noalt='';

var self=this;

$(this).bind("mouseenter",function(ev){/*鼠标经过时添加一个事件处理程序*/

var imageLeft=$(this).offset().left;

var imageTop=$(this).offset().top;

var imageWidth=$(this).get(0).offsetWidth;

var imageHeight=$(this).get(0).offsetHeight;

var boxLeft=$(this).parent().offset().left;

var boxTop=$(this).parent().offset().top;

var boxWidth=$(this).parent().width();

var boxHeight=$(this).parent().height();

noalt=$(this).attr("alt");

var bigimage=$(this).attr("rel");

$(this).attr("alt",'');

if($("div.zoomDiv").get().length==0){

$(document.body).append("div class='zoomDiv'img class='bigimg' src='"+bigimage+"'//div"+

"div class='zoomMask' /div");

}

if(settings.position=="right"){

if(boxLeft+boxWidth+settings.offset+settings.xzoomscreen.width){

leftpos=boxLeft-settings.offset-settings.xzoom;

}else{

leftpos=boxLeft+boxWidth+settings.offset;

}

}else{

leftpos=imageLeft-settings.xzoom-settings.offset;

if(leftpos0){

leftpos=imageLeft+imageWidth+settings.offset;

}

}

$("div.zoomDiv").css({top:boxTop,left:leftpos});

$("div.zoomDiv").width(settings.xzoom);

$("div.zoomDiv").height(settings.yzoom);

$("div.zoomDiv").show();

$(this).css('cursor','crosshair');/*光标呈现十字线*/

$(document.body).mousemove(function(e){/*当移动鼠标时*/

mouse=new MouseEvent(e);

if(mouse.ximageLeft||mouse.ximageLeft+imageWidth||mouse.yimageTop||mouse.yimageTop+imageHeight){

mouseOutImage();/*判断鼠标是否超出图片范围*/

return;

}

var bigwidth=$(".bigimg").get(0).offsetWidth;/*最大宽度*/

var bigheight=$(".bigimg").get(0).offsetHeight;/*最大高度*/

var scaley='x';/*x轴比例 */

var scalex='y';/*y轴比例 */

/*随鼠标移动显示大图*/

if(isNaN(scalex)|isNaN(scaley)){/*x、y轴比例不是数字时*/

var scalex=(bigwidth/imageWidth);

var scaley=(bigheight/imageHeight);

$("div.zoomMask").width((settings.xzoom)/scalex);

$("div.zoomMask").height((settings.yzoom)/scaley);

$("div.zoomMask").css('visibility','visible');/*规定元素可见*/

}

xpos=mouse.x-$("div.zoomMask").width()/2;

ypos=mouse.y-$("div.zoomMask").height()/2;

xposs=mouse.x-$("div.zoomMask").width()/2-imageLeft;

yposs=mouse.y-$("div.zoomMask").height()/2-imageTop;

xpos=(mouse.x-$("div.zoomMask").width()/2imageLeft)

? imageLeft:(mouse.x+$(".zoomMask").width()/2imageWidth+imageLeft)

? (imageWidth+imageLeft-$("div.zoomMask").width()):xpos;

ypos=(mouse.y-$("div.zoomMask").height()/2imageTop)

? imageTop:(mouse.y+$("div.zoomMask").height()/2imageHeight+imageTop)

? (imageHeight+imageTop-$("div.zoomMask").height()):ypos;

$("div.zoomMask").css({top:ypos,left:xpos});

$("div.zoomDiv").get(0).scrollLeft=xposs*scalex;

$("div.zoomDiv").get(0).scrollTop=yposs*scaley;

});

});

function mouseOutImage(){/*定义鼠标离开图片方法*/

$(self).attr("alt",noalt);

$(document.body).unbind("mousemove");/*移除在页面中鼠标指针事件*/

$("div.zoomMask").remove();/*移除所有的div.zoomMask*/

$("div.zoomDiv").remove();/*移除所有的div.zoomDiv*/

}

count=0;

if(settings.preload){

/*在boby元素的结尾（仍然在内部）插入指定内容*/

$('body').append("div style='display:none;' class='jqPreload"+count+"'/div");

$(this).each(function(){/*规定为每个匹配元素规定运行的函数*/

var imagetopreload=$(this).attr("rel");/*图片预加载*/

var content=jQuery('.jqPreload'+count+'').html();

jQuery('.jqPreload'+count+'').html(content+'img src=\"'+imagetopreload+'\"');

});

}

}

})(jQuery);

function MouseEvent(e){/*记录鼠标x，y坐标*/

this.x=e.pageX;/*鼠标指针位置*/

this.y=e.pageY;

}

javascript放大镜代码

同命相连，我也在找这个效果，失望啊！

发现有教程，可是运行不起来，看你会吗？

picclass.asp 图片处理类文件

meta http-equiv="Content-Type" content="text/html; charset=utf-8" /

%

'//////////// GPS：Get Picture Size //////////////

'//////////////利用ADODB.stream获取图片尺寸//////////////

'/////////Cited By Leon（心晴） 2005年8月11日//////////

Class GPS

Dim aso

Private Sub Class_Initialize

Set aso=CreateObject("Adodb.Stream")

aso.Mode=3

aso.Type=1

aso.Open

End Sub

Private Sub Class_Terminate

set aso=nothing

End Sub

Private Function Bin2Str(Bin)

Dim I, Str

For I=1 to LenB(Bin)

clow=MidB(Bin,I,1)

if AscB(clow)128 then

Str = Str Chr(ASCB(clow))

Else

I=I+1

if I = LenB(Bin) then Str = Str Chr(ASCW(MidB(Bin,I,1)clow))

end If

Next

Bin2Str = Str

End Function

Private Function Num2Str(num,base,lens)

'GPS (2005-8-11)

dim ret

ret = ""

while(num=base)

ret = (num mod base) ret

num = (num - num mod base)/base

wend

Num2Str = right(string(lens,"0") num ret,lens)

End Function

Private Function Str2Num(str,base)

'GPS (2005-8-11)

dim ret

ret = 0

for i=1 to len(str)

ret = ret *base + cint(mid(str,i,1))

next

Str2Num=ret

End Function

Private Function BinVal(bin)

'GPS (2002-8-11)

dim ret

ret = 0

for i = lenb(bin) to 1 step -1

ret = ret *256 + ascb(midb(bin,i,1))

next

BinVal=ret

End Function

Private Function BinVal2(bin)

'GPS (2002-8-11)

dim ret

ret = 0

for i = 1 to lenb(bin)

ret = ret *256 + ascb(midb(bin,i,1))

next

BinVal2=ret

End Function

'///以下是调用代码///

Function getImageSize(filespec)

'GPS (2002-8-11)

dim ret(3)

aso.LoadFromFile(filespec)

bFlag=aso.read(3)

select case hex(binVal(bFlag))

case "4E5089":

aso.read(15)

ret(0)="PNG"

ret(1)=BinVal2(aso.read(2))

aso.read(2)

ret(2)=BinVal2(aso.read(2))

case "464947":

aso.read(3)

ret(0)="GIF"

ret(1)=BinVal(aso.read(2))

ret(2)=BinVal(aso.read(2))

case "535746":

aso.read(5)

binData=aso.Read(1)

sConv=Num2Str(ascb(binData),2 ,8)

nBits=Str2Num(left(sConv,5),2)

sConv=mid(sConv,6)

while(len(sConv)nBits*4)

binData=aso.Read(1)

sConv=sConvNum2Str(ascb(binData),2 ,8)

wend

ret(0)="SWF"

ret(1)=int(abs(Str2Num(mid(sConv,1*nBits+1,nBits),2)-Str2Num(mid(sConv,0*nBits+1,nBits),2))/20)

ret(2)=int(abs(Str2Num(mid(sConv,3*nBits+1,nBits),2)-Str2Num(mid(sConv,2*nBits+1,nBits),2))/20)

case "FFD8FF":

do

do: p1=binVal(aso.Read(1)): loop while p1=255 and not aso.EOS

if p1191 and p1196 then exit do else aso.read(binval2(aso.Read(2))-2)

do:p1=binVal(aso.Read(1)):loop while p1255 and not aso.EOS

loop while true

aso.Read(3)

ret(0)="JPG"

ret(2)=binval2(aso.Read(2))

ret(1)=binval2(aso.Read(2))

case else:

if left(Bin2Str(bFlag),2)="BM" then

aso.Read(15)

ret(0)="BMP"

ret(1)=binval(aso.Read(4))

ret(2)=binval(aso.Read(4))

else

ret(0)=""

end if

end select

ret(3)="width=""" ret(1) """ height=""" ret(2) """"

getimagesize=ret

End Function

End Class

%

图片调用文件----------------------------------------------------------------------------------------------------------

%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%

!--#include file="picclass.asp"--

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

""

head

SCRIPT LANGUAGE="JAVASCRIPT"

!--

function maxview(){

if (window.screen){

var w=screen.availwidth;

var h=screen.availheight;

window.moveTo(0,0);

window.resizeTo(w,h);

}

}

// --

/SCRIPT

meta http-equiv="Content-Type" content="text/html; charset=utf-8" /

title/title

SCRIPT src="zoom.js" type=text/javascript/SCRIPT

/head

body onLoad="maxview(); OnLoadMainFunction();"

table width="905" border="0" align="center" cellpadding="15" cellspacing="1"

tr

td valign="top" bgcolor="#FFFFFF"table width="100%" border="0" cellspacing="15"

cellpadding="0"

tr

td valign="top"

%

if request("showid")"" then

sql="update lei_product set dianjishu=dianjishu+1 where id="(request("showid"))

conn.execute(sql)

set rs=server.CreateObject("adodb.recordset")

showstr="select * from lei_product where id=" (request("showid"))

rs.open showstr,conn,1,1

if not rs.bof and not rs.eof then

'/////获取ShowImg.asp的绝对路径/////

Dim curFile

curFile=Server.mappath(Request.servervariables("PATH_INFO"))

Dim curfilename,filename

'/////图片相对路径（存于数据库中）

'cufilename=rs("ImgURL")

cufilename="../admin/upimg/"rs("bigimg2")

cufilename2="../admin/upimg/"rs("bigimg")

'/////因为ShowImg.asp与images在同一目录，所以我们用instrrev获取images的路径/////

filename=left(curFile,instrrev(curFile,"\"))cufilename

filename2=left(curFile,instrrev(curFile,"\"))cufilename2

'/////建立GPS类实体/////

Dim GetPicSize

Set GetPicSize=new GPS

Set fs=Server.CreateObject("Scripting.FileSystemObject")

'/////获取图片类型/////

Dim PicSuffixName

Dim PicSuffixName2

if (fs.FileExists(filename)=false) then

Response.Write("scriptalert('文件加载失败,请确认文件是否存在');history.back(-1);/script")

Response.End()

end if

if (fs.FileExists(filename2)=false) then

Response.Write("scriptalert('文件加载失败,请确认文件是否存在');history.back(-1);/script")

Response.End()

end if

PicSuffixName=fs.GetExtensionName(filename)

PicSuffixName2=fs.GetExtensionName(filename2)

Dim PD '//Picture Dimension

Dim PD2 '//Picture Dimension

Dim PWidth,PHeight

Dim PWidth2,PHeight2

PD=GetPicSize.GetImageSize(filename)

PD2=GetPicSize.GetImageSize(filename2)

PWidth=PD(1) '//获取图片宽度

PWidth2=PD2(1) '//获取图片宽度

PHeight=PD(2) '//获取图片高度

PHeight2=PD2(2) '//获取图片高度

Set fs=Nothing

Set GetPicSize=Nothing

%

SCRIPT type=text/javascript

var usezoom = 1;

var itemimagedir = '';

var zoom_bigimagediv = 'bigimagediv';

var zoom_bigimagetablediv = 'bigimagetablediv';

var zoom_highlightdiv = 'highlightdiv';

var zoom_bigimageouterdiv = 'bigimageouterdiv';

var zoom_viewportwid = 400;//大图图片显示区域

var zoom_viewporthei = 320;//大图片显示区域

var zoom_mainimagewid = %=PWidth2%;//小图宽

var zoom_mainimagehei = %=PHeight2%;//小图高

var zoom_mainimageurl = '../admin/upimg/%=rs("bigimg2")%';

var zoom_zoomimagewid = %=PWidth%;//原图大小宽

var zoom_zoomimagehei = %=PHeight%;//原图大小高

var zoom_zoomimageurl = '../admin/upimg/%=rs("bigimg2")%';//大图地址

var zoom_bigimagetablexoffset = 1;

var zoom_bigimagetableyoffset = 21;

var zoom_displayxposition = 0;

var zoom_displayyposition = 0;

var zoom_miniimagex = 0;

var zoom_miniimagey = 0;

var zoom_highlightbgcolor = 'ffffff';

var zoom_highlightimage = 'highlight.gif';

function GetZoomObjectData() {

var position;

if (!InIE !InNS6 !DOMCompatible)

return;

position = MeMSOObjectGetPosition('mainimage');

zoom_miniimagex = position.x;

zoom_miniimagey = position.y;

position = MeMSOObjectGetPosition('locatezoomim');

zoom_displayxposition = position.x;//显示图片的位置

zoom_displayyposition = position.y - 21;

Zoom_StartupZoomRegion();

}

onloadlist += 'GetZoomObjectData();';

/SCRIPT

table width="100%" border="0" align="center" cellpadding="0" cellspacing="1"

tr

td bgcolor="#FFFFFF" div align="center"

table cellspacing="0" cellpadding="0" width="100%" border="0"

tbody

tr

td valign="center" align="middle" rowspan="4"table cellspacing="1"

cellpadding="2" width="%=PWidth2%"

bgcolor="#efe6dd" border="0" height="%=PHeight2%"

tbody

tr

td bgcolor="#ffffff"img

src="..\admin\upimg\%=rs("bigimg")%" name="mainimage"

border="0" width="%=PWidth2%" height="%=PHeight2%"

id="mainimage" //td

/tr

/tbody

/table

br /

a href="#" target="_blank"点击看大图/a/td

td valign="bottom" align="left" height="5"img height="5"

src="dot_line.gif" width="401" //td

/tr

tr

td valign="bottom" align="left" width="420" height="1"table cellspacing="0"

cellpadding="0" width="100%"

border="0"

tbody

tr

td colspan="2"img id="locatezoomim" height="1"

src="dot_1.gif" width="1"

name="locatezoomim" //td

/tr

/tbody

/table/td

/tr

tr

td valign="top" align="left" width="425"

background="bigImg.gif"

height="330"p  /p/td

/tr

tr

td align="middle"div id="highlightdiv"

style="Z-INDEX: 2; LEFT: -2000px; POSITION: absolute; TOP: -2000px;

visibility: hidden;"/div

div id="bigimageouterdiv"

style="Z-INDEX: 4; LEFT: -2000px; VISIBILITY: visible; OVERFLOW:

hidden; WIDTH: 300px; POSITION: absolute; TOP: -2000px; HEIGHT: 300px"

div id="bigimagediv"

style="Z-INDEX: 4; LEFT: -2000px; POSITION: absolute; TOP: -2000px;

visibility: hidden;"img

id="mainzoomimage" height="2400" src="" width="800" border="0"

name="mainzoomimage" //div

/div

div id="bigimagetablediv" style="Z-INDEX: 3; LEFT: -2000px; POSITION:

absolute; TOP: -2000px; visibility: hidden;"/div/td

/tr

/tbody

/table

/div

div align="right"/div/td

/tr

/table

%end if

rs.close

set rs = nothing

%

%end if

%

/td

/tr

/table/td

/tr

/table

table width="905" height="8" border="0" align="center" cellpadding="0" cellspacing="0"

tr

td/td

/tr

/table

/body

/html

急求个JS图片放大器，可以放大当前显示图层在鼠标指针附件区域，

!DOCTYPE html

html

head

meta charset="gb2312" /

title放大镜/title

style

img{ vertical-align:bottom;}

.mod_zoom{ overflow:hidden; zoom:1;}

.mod_zoom .p1 { float:left; position:relative; height:350px; width:350px; margin-right:5px; }

.mod_zoom .p1 .mask{ position:absolute; left:0; top:0; width:175px; height:175px; background-color:#fede4f; opacity:0.3; filter: alpha(opacity=30); display:none; }

.mod_zoom .p2{ position:relative; width:400px; height:400px; overflow:hidden; display:none;}

.mod_zoom .p2 .img{ position:absolute; left:0; top:0;}

.mod_zoom .ph{width:100%; height:350px; position:absolute; top:0; left:0; cursor:crosshair;

/*background-color:red*/

/*如果给它绑定事件处理函数，IE中不设置background-color属性就不触发事件*/ }

/style

/head

body

div

div class="mod_zoom"

div class="p1" id="p1"

img src="" id="z1" /

span class="mask" id="m"/span

span class="ph" id="eventproxy"/span

/div

div class="p2" id="p2"

img src="" class="img" id="z2" /

/div

/div

/div

script

function PhotoZoomer(elements){

this.mask = elements.mask; //蒙版

this.container = elements.container //原图容器

this.originimg = elements.originimg; //原图

this.eventproxy = elements.eventproxy;

this.bigContainer = elements.bigContainer; //大图容器

this.bigimg = elements.bigimg; //大图

this.visible = false;

this._bind();

}

PhotoZoomer.prototype = {

display: function(style){

var self = this;

self.mask.style.display = style;

self.bigContainer.style.display = style;

},

//计算放大蒙版位置

zoom: function(clientX, clientY){

var self = this,

//位置比例

rate = {},

//放大蒙版最大活动范围

maxrange = {

offsetLeft: self.container.offsetWidth - self.mask.offsetWidth,

offsetTop: self.container.offsetHeight - self.mask.offsetHeight

},

//mask left

left = clientX - self.container.offsetLeft - self.mask.offsetWidth/2,

//mask top

top = clientY - self.container.offsetTop - self.mask.offsetHeight/2;

if(left 0) {

left = 0;

}else if(left maxrange.offsetLeft) {

left = maxrange.offsetLeft;

}

if(top 0) {

top = 0;

}else if(top maxrange.offsetTop){

top = maxrange.offsetTop;

}

//alert(maxrange.offsetTop);

rate.left = left / maxrange.offsetLeft;

rate.top = top / maxrange.offsetTop;

self.mask.style.left = left + 'px';

self.mask.style.top = top + 'px';

self.bigimg.style.left = -rate.left * (self.bigimg.offsetWidth - self.bigContainer.offsetWidth) + "px";

self.bigimg.style.top = -rate.top * (self.bigimg.offsetHeight - self.bigContainer.offsetHeight) + "px";

},

_bind: function(){

var self = this;

self.container.onmouseover = function(e){

e = e || window.event;

var target = e.targe || e.srcElement;

self.display("block");

this.visible = true;

};

self.container.onmouseout = function(e){

e = e || window.event;

var target = e.targe || e.srcElement;

self.display("none");

this.visible = false;

};

self.container.onmousemove = function(e){

e = e || window.event;

if(!this.visible )return;//防止元素大小计算错误

self.zoom(e.clientX, e.clientY);

};

}

};

function get(id){

return document.getElementById(id)

}

var elements = {

mask: get("m"),

container: get("p1"),

originimg: get("z1"),

bigContainer: get("p2"),

bigimg: get("z2"),

eventproxy: get("eventproxy")

};

var zoomer = new PhotoZoomer(elements);

// alert(elements.container.offsetParent.tagName)

/script

/body

/html

关于原生js放大镜效果代码和js放大镜功能的介绍到此就结束了，不知道你从中找到你需要的信息了吗 ？如果你还想了解更多这方面的信息，记得收藏关注本站。