兼容IE6的图片圆角边框CSS

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实现原理很简单,利用绝对定位,使一个背景为PNG图片的边框覆盖在原始图片上面.而兼容IE6,本文用的是一段JS来让万恶的万万人诅咒的IE6识别PNG图片的.当然,你还可以用滤镜的方式让IE6实现PNG效果.本文后面我会附上两种解决方案.个人比较推崇用JS来实现IE6PNG,适应性比较强,但如果你只有一两处用到PNG,完全可以用滤镜的方式来实现.
核心CSS代码:

复制代码代码如下:
.i_roundimg{ background:url(https://www.jb51.net/do/uploads/userup/1007/04191G15618.png) no-repeat;cursor:pointer;width:60px;height:60px;position:absolute;}

DEMO用到的PNG背景图片:

<!DOCTYPE html> <html> <head> <meta charset="gb2312" /> <title>兼容IE6的图片圆角边框@Mr.Think</title> <style> body{font-size:0.8em;letter-spacing:1px;font-family:"微软雅黑"; line-height:1.8em} h1{font-size:1em; font-weight:normal;} h1 a{background:#CFF; padding:2px 3px; text-decoration:none;} h1 a:hover{background:#eee; text-decoration:underline} h2{font-size:1.2em; color:#a40000; text-align:center; line-height:2em} .box{width:600px; margin:2em auto} .box li{display:inline; margin:1em} .box li img{width:60px; height:60px;border:0;} .box li .i_roundimg{ background:url(https://www.jb51.net/do/uploads/userup/1007/04191G15618.png) no-repeat;cursor:pointer;width:60px;height:60px;position:absolute;} /*如果只有一处用到PNG背景可以用以下代码 .box li .i_roundimg{ background:url(https://www.jb51.net/do/uploads/userup/1007/04191G15618.png) no-repeat;_background:none;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='https://www.jb51.net/do/uploads/userup/1007/04191G15618.png',sizingMethod='scale');cursor:pointer;width:60px;height:60px;position:absolute;} */ </style> </head> <body> <h1><a href="http://mrthink.net/">Mr.Think的个人博客</a>@专注前端技术,热爱PHP,崇尚简单生活.</h1> <h2>兼容IE6的图片圆角边框@Mr.Think,支持可恨可恶的万万人诅咒的IE6哦~</h2> <ol class="box"> <li><a target="_blank" href="http://mrthink.net/"><span class="i_roundimg"></span><img src="/UploadFiles/2021-03-30/logo.gif"><br><input class="fn-butt" type="button" value="运行代码" onclick="runCode('runcode39')"> <input class="fn-butt" type="button" value="复制代码" onclick="copy2(runcode39)"> <input class="fn-butt" type="button" value="另存代码" onclick="saveCode(runcode39)">  提示：您可以先修改部分代码再运行<br>另外附上两种解决IE6下PNG图片的方案: <br>JavaScript让IE6识别PNG(适应性强,适应于背景PNG和页面中的PNG): <br><br><u>复制代码</u>代码如下: <br>eval(function(p,a,c,k,e,r){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('2 E={J:\'E\',Z:{},1E:7(){4(x.1l&&!x.1l[6.J]){x.1l.23(6.J,\'24:25-26-27:3\')}4(1F.11){1F.11(\'28\',7(){E=29})}},1G:7(){2 a=x.1m(\'8\');x.1H.1b.1n(a,x.1H.1b.1b);2 b=a.1o;b.1c(6.J+\'\\\\:*\',\'{12:2a(#1I#2b)}\');b.1c(6.J+\'\\\\:9\',\'Q:1p;\');b.1c(\'1J.\'+6.J+\'1K\',\'12:y; 1q:y; Q:1p; z-2c:-1; 1d:-1r; 1L:1M;\');6.1o=b},1N:7(){2 a=13.2d;4(13.1e.K(\'2e\')!=-1||13.1e.K(\'1q\')!=-1){E.1f(a)}4(13.1e==\'8.1s\'){2 b=(a.F.1s==\'y\')?\'y\':\'2f\';G(2 v M a.3){a.3[v].9.8.1s=b}}4(13.1e.K(\'14\')!=-1){E.1t(a)}},1t:7(a){4(a.F.14.K(\'2g\')!=-1){2 b=a.F.14;b=1u(b.2h(b.1v(\'=\')+1,b.1v(\')\')),10)/2i;a.3.N.9.8.14=a.F.14;a.3.C.I.2j=b}},15:7(a){2k(7(){E.1f(a)},1)},2l:7(a){2 b=a.1O(\',\');G(2 i=0;i<b.2m;i++){6.1o.1c(b[i],\'12:2n(E.1P(6))\')}},1f:7(a){a.S.1Q=\'\';6.1R(a);6.16(a);6.1t(a);4(a.O){6.1S(a)}},1T:7(b){2 c=6;2 d={2o:\'16\',2p:\'16\'};4(b.17==\'A\'){2 e={2q:\'15\',2r:\'15\',2s:\'15\',2t:\'15\'};G(2 a M e){d[a]=e[a]}}G(2 h M d){b.11(\'1w\'+h,7(){c[d[h]](b)})}b.11(\'2u\',6.1N)},1x:7(a){a.8.2v=1;4(a.F.Q==\'2w\'){a.8.Q=\'2x\'}},1S:7(a){2 b={\'2y\':P,\'2z\':P,\'2A\':P};G(2 s M b){a.3.N.9.8[s]=a.F[s]}},1R:7(a){4(!a.F){1g}U{2 b=a.F}G(2 v M a.3){a.3[v].9.8.1U=b.1U}a.S.18=\'\';a.S.19=\'\';2 c=(b.18==\'1V\');2 d=P;4(b.19!=\'y\'||a.O){4(!a.O){a.D=b.19;a.D=a.D.2B(5,a.D.1v(\'")\')-5)}U{a.D=a.1h}2 e=6;4(!e.Z[a.D]){2 f=x.1m(\'1J\');e.Z[a.D]=f;f.2C=e.J+\'1K\';f.S.1Q=\'12:y; Q:1p; 1y:-1r; 1d:-1r; 1q:y;\';f.11(\'2D\',7(){6.1i=6.2E;6.1j=6.2F;e.16(a)});f.1h=a.D;f.1W(\'1i\');f.1W(\'1j\');x.1X.1n(f,x.1X.1b)}a.3.C.I.1h=a.D;d=V}a.3.C.I.1w=!d;a.3.C.I.N=\'y\';a.3.N.9.8.18=b.18;a.S.19=\'y\';a.S.18=\'1V\'},16:7(e){2 f=e.F;2 g={\'W\':e.2G+1,\'H\':e.2H+1,\'w\':6.Z[e.D].1i,\'h\':6.Z[e.D].1j,\'L\':e.2I,\'T\':e.2J,\'1k\':e.2K,\'1z\':e.2L};2 i=(g.L+g.1k==1)?1:0;2 j=7(a,l,t,w,h,o){a.2M=w+\',\'+h;a.2N=o+\',\'+o;a.2O=\'2P,1Y\'+w+\',1Y\'+w+\',\'+h+\'2Q,\'+h+\' 2R\';a.8.1i=w+\'u\';a.8.1j=h+\'u\';a.8.1y=l+\'u\';a.8.1d=t+\'u\'};j(e.3.N.9,(g.L+(e.O?0:g.1k)),(g.T+(e.O?0:g.1z)),(g.W-1),(g.H-1),0);j(e.3.C.9,(g.L+g.1k),(g.T+g.1z),(g.W),(g.H),1);2 k={\'X\':0,\'Y\':0};2 m=7(a,b){2 c=P;2S(b){1a\'1y\':1a\'1d\':k[a]=0;1A;1a\'2T\':k[a]=.5;1A;1a\'2U\':1a\'2V\':k[a]=1;1A;1I:4(b.K(\'%\')!=-1){k[a]=1u(b)*.2W}U{c=V}}2 d=(a==\'X\');k[a]=2X.2Y(c?((g[d?\'W\':\'H\']*k[a])-(g[d?\'w\':\'h\']*k[a])):1u(b));4(k[a]==0){k[a]++}};G(2 b M k){m(b,f[\'2Z\'+b])}e.3.C.I.Q=(k.X/g.W)+\',\'+(k.Y/g.H);2 n=f.30;2 p={\'T\':1,\'R\':g.W+i,\'B\':g.H,\'L\':1+i};2 q={\'X\':{\'1B\':\'L\',\'1C\':\'R\',\'d\':\'W\'},\'Y\':{\'1B\':\'T\',\'1C\':\'B\',\'d\':\'H\'}};4(n!=\'1D\'){2 c={\'T\':(k.Y),\'R\':(k.X+g.w),\'B\':(k.Y+g.h),\'L\':(k.X)};4(n.K(\'1D-\')!=-1){2 v=n.1O(\'1D-\')[1].31();c[q[v].1B]=1;c[q[v].1C]=g[q[v].d]}4(c.B>g.H){c.B=g.H}e.3.C.9.8.1Z=\'20(\'+c.T+\'u \'+(c.R+i)+\'u \'+c.B+\'u \'+(c.L+i)+\'u)\'}U{e.3.C.9.8.1Z=\'20(\'+p.T+\'u \'+p.R+\'u \'+p.B+\'u \'+p.L+\'u)\'}},1P:7(a){a.8.12=\'y\';4(a.17==\'32\'||a.17==\'33\'||a.17==\'34\'){1g}a.O=V;4(a.17==\'35\'){4(a.1h.21().K(/\\.22$/)!=-1){a.O=P;a.8.1L=\'1M\'}U{1g}}U 4(a.F.19.21().K(\'.22\')==-1){1g}2 b=E;a.3={N:{},C:{}};2 c={9:{},I:{}};G(2 r M a.3){G(2 e M c){2 d=b.J+\':\'+e;a.3[r][e]=x.1m(d)}a.3[r].9.36=V;a.3[r].9.37(a.3[r].I);a.38.1n(a.3[r].9,a)}a.3.C.9.39=\'y\';a.3.C.I.3a=\'3b\';a.3.N.I.1w=V;b.1T(a);b.1x(a);b.1x(a.3c);b.1f(a)}};3d{x.3e("3f",V,P)}3g(r){}E.1E();E.1G();',62,203,'||var|vml|if||this|function|style|shape|||||||||||||||||||||px|||document|none||||image|vmlBg|EvPNG|currentStyle|for||fill|ns|search||in|color|isImg|true|position||runtimeStyle||else|false||||imgSize||attachEvent|behavior|event|filter|handlePseudoHover|vmlOffsets|nodeName|backgroundColor|backgroundImage|case|firstChild|addRule|top|propertyName|applyVML|return|src|width|height|bLW|namespaces|createElement|insertBefore|styleSheet|absolute|border|10000px|display|vmlOpacity|parseInt|lastIndexOf|on|giveLayout|left|bTW|break|b1|b2|repeat|createVmlNameSpace|window|createVmlStyleSheet|documentElement|default|img|_sizeFinder|visibility|hidden|readPropertyChange|split|fixPng|cssText|vmlFill|copyImageBorders|attachHandlers|zIndex|transparent|removeAttribute|body|0l|clip|rect|toLowerCase|png|add|urn|schemas|microsoft|com|onbeforeunload|null|url|VML|index|srcElement|background|block|lpha|substring|100|opacity|setTimeout|fix|length|expression|resize|move|mouseleave|mouseenter|focus|blur|onpropertychange|zoom|static|relative|borderStyle|borderWidth|borderColor|substr|className|onload|offsetWidth|offsetHeight|clientWidth|clientHeight|offsetLeft|offsetTop|clientLeft|clientTop|coordsize|coordorigin|path|m0|l0|xe|switch|center|right|bottom|01|Math|ceil|backgroundPosition|backgroundRepeat|toUpperCase|BODY|TD|TR|IMG|stroked|appendChild|parentNode|fillcolor|type|tile|offsetParent|try|execCommand|BackgroundImageCache|catch'.split('|'),0,{})) <br>EvPNG.fix('div,span'); //EvPNG.fix('@Mr.Think提示你:请在此处设置包含透明PNG图片的标签'),多个标签之间用英文逗号隔开. <br><br>IE滤镜让IE6实现PNG效果(适应性差,一般用于仅一两处用到PNG背景的情况): <br><br>filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/do/uploads/allimg/100704/1923432.png',sizingMethod='scale');</div>

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