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<html> <head> <title>JS配合CSS实现的漂亮渐变背景特效6个实例|kiddy官网|河北运动地板</title> <script> var setGradient = (function(){ var p_dCanvas = document.createElement(‘canvas‘); var p_useCanvas = !!( typeof(p_dCanvas.getContext) == ‘function‘); var p_dCtx = p_useCanvas?p_dCanvas.getContext(‘2d‘):null; var p_isIE = /*@cc_on!@*/false; try{ p_dCtx.canvas.toDataURL() }catch(err){ p_useCanvas = false ; }; if(p_useCanvas){ return function (dEl , sColor1 , sColor2 , bRepeatY ){ if(typeof(dEl) == ‘string‘) dEl = document.getElementById(dEl); if(!dEl) return false; var nW = dEl.offsetWidth; var nH = dEl.offsetHeight; p_dCanvas.width = nW; p_dCanvas.height = nH; var dGradient; var sRepeat; if(bRepeatY){ dGradient = p_dCtx.createLinearGradient(0,0,nW,0); sRepeat = ‘repeat-y‘; }else{ dGradient = p_dCtx.createLinearGradient(0,0,0,nH); sRepeat = ‘repeat-x‘; } dGradient.addColorStop(0,sColor1); dGradient.addColorStop(1,sColor2); p_dCtx.fillStyle = dGradient ; p_dCtx.fillRect(0,0,nW,nH); var sDataUrl = p_dCtx.canvas.toDataURL(‘image/png‘); with(dEl.style){ backgroundRepeat = sRepeat; backgroundImage = ‘url(‘ + sDataUrl + ‘)‘; backgroundColor = sColor2; }; } }else if(p_isIE){ p_dCanvas = p_useCanvas = p_dCtx = null; return function (dEl , sColor1 , sColor2 , bRepeatY){ if(typeof(dEl) == ‘string‘) dEl = document.getElementById(dEl); if(!dEl) return false; dEl.style.zoom = 1; var sF = dEl.currentStyle.filter; dEl.style.filter += ‘ ‘ + [‘progid:DXImageTransform.Microsoft.gradient( GradientType=‘, +(!!bRepeatY ),‘,enabled=true,startColorstr=‘,sColor1,‘, endColorstr=‘,sColor2,‘)‘].join(‘‘); }; }else{ p_dCanvas = p_useCanvas = p_dCtx = null; return function(dEl , sColor1 , sColor2 ){ if(typeof(dEl) == ‘string‘) dEl = document.getElementById(dEl); if(!dEl) return false; with(dEl.style){ backgroundColor = sColor2; }; } } })(); </script> <style> body{font:0.75em/1.4 Arial;text-align:left;margin:20px;} hr{clear:both;visibility:hidden;} xmp{font:12px/12px "Courier New";background:#fff;color:#666; border:solid 1px #ccc;} div.example{ border:solid 1px #555;margin:0 20px 20px 0;float:left; display:inline;margin:1em;background:#fff;width:300px;padding:40px;color:#222;font:xx-small/1.2 "Tahoma";text-align:justify;} </style> <body> <div id="example1" class="example">CSS特效代码。</div> <div id="example2" class="example">各类编程源码、 </div> <div id="example3" class="example">精品软件</div> <div id="example4" class="example">上海世博园 </div> <div id="example5" class="example">我家北京天安门</div> <div id="example6" class="example">北京欢迎您！</div> <script> setGradient(‘example1‘,‘#4ddbbe‘,‘#d449cc‘,1); setGradient(‘example2‘,‘#46ddbd‘,‘#d8b617‘,0); setGradient(‘example3‘,‘#c81fc1‘,‘#bf445f‘,1); setGradient(‘example4‘,‘#2285e5‘,‘#d769eb‘,0); setGradient(‘example5‘,‘#8b4286‘,‘#eac87d‘,1); setGradient(‘example6‘,‘black‘,‘white‘,0); </script> </body> </html>
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原文地址：http://www.cnblogs.com/zhaozzm/p/4462240.html
