CSS 漸變背景的6個演示代碼

更新時間：2009年10月24日 11:53:26 作者：

CSS漸變背景的六個示例，個人覺得這是非常實用的一個常用技巧，不使用任何圖片實現(xiàn)Div背景漸變，而且兼容IE和FF2，以后想要類似的效果，可有的參考了。

<!doctype html public '-//w3c//dtd html 4.01//en' 'http://www.w3.org/tr/html4/strict.dtd'> <html> <head> <meta http-equiv=content-type content="text/html; charset=gbk"> <title>CSS漸變背景</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   class="33npfzf"   id="example1" class="example">腳本之家（jb51.net）提供JavaScript/CSS特效代碼。</div> <div   class="bbt3flt"   id="example2" class="example">腳本之家各類編程源碼、 </div> <div   class="lppvdtj"   id="example3" class="example">提供各類編程源碼</div> <div   class="t3rjrb3"   id="example4" class="example">腳本之家（jb51.net） </div> <div   class="jzdrvbv"   id="example5" class="example">jb51.net </div> <div   class="jvv3fld"   id="example6" class="example">腳本之家 </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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