js放大镜效果的框的位置怎么控制

JavaScript023

js放大镜效果的框的位置怎么控制,第1张

得到鼠标的pageX pageY   得到黄框父元素的offsetLeft offsetTop

pageX-offsetLeft得到黄框内x的位置  pageY-offsetTop得到黄框内y的位置

黄框.style.left = x-黄框.offsetWidth / 2 +'px'   黄框.style.top = y-黄框.offsetWidth / 2 +'px'

if(黄框.style.left <0){黄框.style.left = 0} else if(黄框.style.left >黄框父元素.offsetWidth - 黄框.offsetWidth){黄框.style.left = 黄框父元素.offsetWidth - 黄框.offsetWidth + 'px'}

同理top

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/htmlcharset=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=sConv&Num2Str(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 p1>191 and p1<196 then exit do else aso.read(binval2(aso.Read(2))-2)

do:p1=binVal(aso.Read(1)):loop while p1<255 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"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<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/htmlcharset=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("<script>alert('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("<script>alert('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: 2LEFT: -2000pxPOSITION: absoluteTOP: -2000px

visibility: hidden"></div>

<div id="bigimageouterdiv"

style="Z-INDEX: 4LEFT: -2000pxVISIBILITY: visibleOVERFLOW:

hiddenWIDTH: 300pxPOSITION: absoluteTOP: -2000pxHEIGHT: 300px">

<div id="bigimagediv"

style="Z-INDEX: 4LEFT: -2000pxPOSITION: absoluteTOP: -2000px

visibility: hidden"><img

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

name="mainzoomimage" /></div>

</div>

<div id="bigimagetablediv" style="Z-INDEX: 3LEFT: -2000pxPOSITION:

absoluteTOP: -2000pxvisibility: 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>