http://bbs.blueidea.com/thread-2814846-1-1.html
应用效果
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><title>Javascript Images zoom-out view sample. Brought to you by 斩梦人.天天 QQ:22062019</title>
<script language="JavaScript">
<!--var dshowW=450; //默认预览图宽度(可由小图的showW,showH动态指定)var dshowH=300; //默认预览图高度var bborder=1; //大图边框var sborder=1; //小图边框var vborder=1; //小预览图边框var bigW,bigH,smallW,smallH,showW,showH,viewW,viewH;//大图,小图,预览窗,小预览窗var nview,nflag,picstatus,tempo,abox,zoomX,zoomY;//初始化
window.onload=function init(){ isIE=window.event?1:0; picshow.style.borderWidth=bborder; picshow.style.width=dshowW; picshow.style.height=dshowH; bpic.style.display=""; abox=document.body.getElementsByTagName("div"); //初始化所有小图 for (n=0;n<abox.length;n++) if (abox[n].className=="picbox"){ var o=abox[n]; var view=getview(o); var img=getimg(o); view.style.borderWidth=vborder; o.style.borderWidth=sborder; o.style.width=img.width+sborder*2*isIE; o.style.height=img.height+sborder*2*isIE; o.setAttribute("pid",n); //小图标记,主键唯一 if (o.getAttribute("show")=="show") loadpic(o); o.onmouseout=function (){setTimeout(nview.style.visibility='hidden');}
}}//载入图片function loadpic(o){ var view=getview(o); var img=getimg(o); bpic.style.display="none"; nview=view; //标记活动小预览窗 nflag=o.getAttribute("pid"); //当前图片标记,用来判断切换图片 //改变预览窗大小 if (img.getAttribute("showW")!=null) showW=parseInt(img.getAttribute("showW")); else showW=dshowW; if (img.getAttribute("showH")!=null) showH=parseInt(img.getAttribute("showH")); else showH=dshowH; picshow.style.width=showW+isIE*bborder*2; picshow.style.height=showH+isIE*bborder*2; loading.style.marginTop=(showH-loading.offsetHeight)/2; if (img.getAttribute("dLeft")) bpic.style.marginLeft=-parseInt(img.getAttribute("dLeft")); if (img.getAttribute("dTop")) bpic.style.marginTop=-parseInt(img.getAttribute("dTop")); picstatus="loading"; tempo=o; bpic.src=img.lowsrc;}//图片载入完成function loaddone(o){ bpic.style.display="block"; var view=getview(o); var img=getimg(o); smallW=img.width; //改变小图,小预览窗大小 smallH=img.height; bigW=bpic.width; bigH=bpic.height; if (showW>bigW){//如果预览图比大图大,则等于大图 showW=bigW; picshow.style.width=showW+isIE*bborder*2; } if (showH>bigH){ showH=bigH; picshow.style.height=showH+isIE*bborder*2; } zoomX=bigW/smallW; zoomY=bigH/smallH; viewW=showW*smallW/bigW; viewH=showH*smallH/bigH; nview.style.width=viewW-vborder*2*!isIE; nview.style.height=viewH-vborder*2*!isIE; nview.style.display="block"; img.style.top=-nview.offsetHeight; if (!nview.style.left) nview.style.left=0; if (!nview.style.top) nview.style.top=0; picstatus="done"}//移动事件function move(e,o,flag){ //flag,对象来源标记,FF下view的定位需要 o=isIE?o.parentElement:o.parentNode; if (o.getAttribute("pid")!=nflag){ //判断是否切换了图片 nview.style.visibility="hidden"; loadpic(o); //载入新图片 } if (picstatus="done"){ //如果大图载入完毕 if (nview.style.visibility="hidden") nview.style.visibility="visible"; var e=isIE?window.event:e; if (isIE==0){ //分别获取FF或IE的view位置 if (flag==1){ //由于o的来源不同,使用不同的算法定位 vX=e.layerX+parseInt(nview.style.left)-nview.offsetWidth/2-vborder; vY=e.layerY+parseInt(nview.style.top)-nview.offsetHeight/2-vborder; }else{ vX=e.layerX-nview.offsetWidth/2-vborder; vY=e.layerY-nview.offsetHeight/2-vborder; } } else{ vX=e.offsetX-nview.offsetWidth/2; vY=e.offsetY-nview.offsetHeight/2; } if (vX < 0) vX = 0; //边界判断,不能超出缩略图的范围 if (vY < 0) vY = 0; if (vX > smallW-viewW) {vX=smallW-viewW;mX=bigW-showW}else{mX=vX * zoomX;} if (vY > smallH-viewH) {vY=smallH-viewH;mY=bigH-showH}else{mY=vY * zoomY;} nview.style.left=vX; nview.style.top=vY; bpic.style.marginLeft = - mX; //刷新预览窗口 bpic.style.marginTop = - mY; }}//得到viewfunction getview(o){ var arr=o.getElementsByTagName("div"); var n; for (n=0;n<arr.length;n++) if (arr[n].className="view") return arr[n];}//得到imgfunction getimg(o){ var arr=o.getElementsByTagName("img"); var n; for (n=0;n<arr.length;n++) if (arr[n].className="spic") return arr[n];}
//--></script><style type="text/css"><!--*{}{padding:0;margin:0}body{}{color:white;background:black;font:bold 12px/18px tahoma;color:white;}#picshow{}{border:1px red solid;width:200;height:150;overflow:hidden;margin:0 auto}/**//*width,height随便定义,为了第一次显示时能看见loading*/#bpic{}{display:none}#loading{}{font:bold 22px/30px tahoma;color:white;}#loading img{}{vertical-align:middle;position:relative}#loading .text{}{font:bold 12px/20px tahoma;color:white;}.picbox{}{border:1px green dashed;overflow:hidden;float:left;width:0;height:0;text-align:left}/**//*注意:overflow:hidden;text-align:left不可更改,如果在IE的表格中定位会出问题*/.spic{}{position:relative;}/**//*position:relative不可更改*/.view{}{border:1px silver solid;z-index:100;font-size:1px;position:relative;visibility:hidden;display:none}/**//*position:relative;visibility:hidden;display:none不可更改*/td{}{text-align:center;height:60px;font-size:30px;margin:0 auto}//--></style></head><body>Some text here<br>ok.| 您需要做的仅仅是加入picshow块和picbox块,设置必要参数,剩下的就让JS去做吧! (移到小图上看更多说明)<table cellpadding="0" cellspacing="0" border="2" width="100%"><tr> <td>1</td> <td>2</td> <td>3</td></tr><tr> <td width="520" align="center"><div id="picshow"> <img id="bpic" onload="loaddone(tempo)"/> <div id="loading"> <img src="http://www.whoj.net/images/loading.gif" border="0"/> Loading <div class="text">Please wait<br><br><br></div> </div></div> </td> <td><div class="picbox" show="show"><!--设置show显示默认图片--> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b1.jpg" src="http://www.whoj.net/images/s1.jpg" onmousemove="move(event,this,0)" dLeft="700" dTop="300" title="设置标签属性show='show'显示默认图片,设置dLeft,dTop定义默认偏移量"/><!--src:小图,lowsrc:大图,showW/showH:可设置预览窗大小--></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b2.jpg" src="http://www.whoj.net/images/s2.jpg" onmousemove="move(event,this,0)" showW="200" showH="200" title="可自定义预览图大小"/></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b4.jpg" src="http://www.whoj.net/images/s4.jpg" width="302" onmousemove="move(event,this,0)" title="小图可以按比例放大"/><!--这里可以重新设置小图大小,尽量与大图比例保持一致--></div> </td> <td>In table<div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b3.jpg" src="http://www.whoj.net/images/s3.jpg" width="60" onmousemove="move(event,this,0)" title="也可以按比例缩小"/></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b3.jpg" src="http://www.whoj.net/images/s3.jpg" onmousemove="move(event,this,0)" showW="500" showH="200" title="可以嵌套在table中"/></div> </td></tr></table>Out of table<div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b2.jpg" src="http://www.whoj.net/images/s2.jpg" onmousemove="move(event,this,0)" title="放在table外面也没有问题"/></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/s4.jpg" src="http://www.whoj.net/images/s4.jpg" onmousemove="move(event,this,0)" showW="1000" showH="1000" title="showW='1000' showH='1000',如果指定预览图比原图大,则使用原图大小" /></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b5.jpg" src="http://www.whoj.net/images/s5.jpg" onmousemove="move(event,this,0)" showW="160" showH="320" title="代码较上一版本健壮,能在IE,FF下稳定工作,基本支持OP,欢迎大家帮助测试!"/></div><div class="picbox"> <div class="view" onmousemove="if (!isIE) move(event,this,1)"></div> <img class="spic" lowsrc="http://www.whoj.net/images/b5.jpg" src="http://www.whoj.net/images/s5.jpg" onmousemove="move(event,this,0)" width="500" height="112" title="即使没有按比例拉伸,也可以正常工作"/></div></body></html>
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