一个实用的小图弹大图的js图片展示效果

[作者:yfstudio|时间:2008-06-16| 收藏投稿 ]【大中小】

好久没来看了最近做了一个小图弹大图的js图片展示效果,请大家观摩....
功能:ie6 ie7 Firefox2 Safari3.11 Opera9已测
1 点击小图弹出大图,虚化周围背景,自适应图片大小;
2 如果弹出大图可以,双击可以全景和实际尺寸间切换;
3 超出浏览器显示的大图会出现滚动条,同时也可以用鼠标拖动大图;
4 随鼠标动作出现的关闭按钮,鼠标不动作则自动隐藏;
其它:右击图片关闭,双击背景关闭.
暇僻:弹出大图后有滚动条全和浏览器滚动条同时存在,大家给点UE建议,进一步完善.

运行代码框

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style='color:#999999;font-weight:normal'>Image loading...</b><br /></div>"; var closeTag=document.createElement("div"); closeTag.style.cssText="display:none;position:absolute;left:10px;top:10px;background:red;border:1px solid white;yellow:white;filter:Alpha(Opacity=50);Opacity:0.5;cursor:pointer;"; closeTag.innerHTML="<b> 关闭 </b>"; closeTag.onclick=closes; document.body.appendChild(tag); document.body.appendChild(tagImg); var img=new Image(); img.src=imgPath; img.style.cssText="border:1px solid #cccccc;filter: Alpha(Opacity=0);Opacity:0;"; tagImg.oncontextmenu=function(){var clsOK=confirm("确定要取消图片显示吗?"); if(clsOK){closes();};return false}; var barShow,imgTime; img.complete?ImgOK():img.onload=ImgOK; function ImgOK(){ var Stop1=false,Stop2=false,temp=0; var tx=tagImg.offsetWidth,ty=tagImg.offsetHeight; var ix=img.width,iy=img.height; var sx=document.documentElement.clientWidth,sy=Math.min(document.documentElement.clientHeight,document.body.clientHeight/*opera*/); var xx=ix>sx?sx-50:ix+4,yy=iy>sy?sy-50:iy+3; var maxTime=setInterval(function(){ temp+=35; if((tx+temp)<xx){ tagImg.style.width=(tx+temp)+"px"; tagImg.style.left=(sx-(tx+temp))/2+"px"; }else{ Stop1=true; tagImg.style.width=xx+"px"; tagImg.style.left=(sx-xx)/2+"px"; } if((ty+temp)<yy){ tagImg.style.height=(ty+temp)+"px"; tagImg.style.top=(tagTop+((sy-(ty+temp))/2))+"px"; }else{ Stop2=true; tagImg.style.height=yy+"px"; tagImg.style.top=(tagTop+((sy-yy)/2))+"px"; } if(Stop1&&Stop2){ clearInterval(maxTime); tagImg.appendChild(img); temp=0; imgOPacity(); } },1); function imgOPacity(){ temp+=10; img.style.filter="alpha(opacity="+temp+")"; img.style.opacity=temp/100; imgTime=setTimeout(imgOPacity,1) if(temp>100) clearTimeout(imgTime); } tagImg.innerHTML=""; tagImg.appendChild(closeTag); if(ix>xx||iy>yy){ img.alt="左键拖动,双击放大缩小"; img.ondblclick=function (){ if(tagImg.offsetWidth<img.offsetWidth||tagImg.offsetHeight<img.offsetHeight){ img.style.width="auto"; img.style.height="100%"; img.alt="双击可以放大"; img.onmousedown=null; closeTag.style.top="10px"; closeTag.style.left="10px"; tagImg.style.overflow="visible"; tagImg.style.width=img.offsetWidth+"px"; tagImg.style.left=((sx-img.offsetWidth)/2)+"px"; }else{ img.style.width=ix+"px"; img.style.height=iy+"px"; img.alt="双击可以缩小"; img.onmousedown=dragDown; tagImg.style.overflow="auto"; tagImg.style.width=xx+"px"; tagImg.style.left=((sx-xx)/2)+"px"; } } img.onmousedown=dragDown; tagImg.onmousemove=barHidden; tagImg.onmouseout=moveStop; document.onmouseup=moveStop; }else{ tagImg.style.overflow="visible"; tagImg.onmousemove=barHidden; } } function dragDown(a){ img.style.cursor="pointer"; var evts=a||window.event; var onx=evts.clientX,ony=evts.clientY; var sox=tagImg.scrollLeft,soy=tagImg.scrollTop; var sow=img.width+2-tagImg.clientWidth,soh=img.height+2-tagImg.clientHeight; var xxleft,yytop; document.onmousemove=function(e){ var evt=e||window.event; xxleft=sox-(evt.clientX-onx)<0?"0":sox-(evt.clientX-onx)>sow?sow:sox-(evt.clientX-onx); yytop=soy-(evt.clientY-ony)<0?"0":soy-(evt.clientY-ony)>soh?soh:soy-(evt.clientY-ony); tagImg.scrollTop=yytop; tagImg.scrollLeft=xxleft; closeTag.style.top=(yytop+10)+"px"; closeTag.style.left=(xxleft+10)+"px"; return false; } return false; } function barHidden(){ clearTimeout(barShow); if(closeTag.style.display=="none")closeTag.style.display="block"; barShow=setTimeout(function(){closeTag.style.display="none";},2000); } function closes(){ document.body.removeChild(tag); document.body.removeChild(tagImg); clearTimeout(barShow); clearTimeout(imgTime); document.onmouseup=null; tag=img=tagImg=closeTag=null; } function moveStop(){ document.onmousemove=null; tagImg.onmousemove=barHidden; img.style.cursor="default"; } } </script> <script type="text/javascript">//实例化 var imgList1=document.getElementById("xwxc").getElementsByTagName("img"); var imgList3=document.getElementById("wenchuan").getElementsByTagName("img"); for(var i in imgList1){ imgList1[i].onclick=ImgShow; } for(var i in imgList3){ imgList3[i].onclick=ImgShow; } </script> </body> </html>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

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Tags：图片展示 小图弹大图

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