CSS和javacript实现各种各样的渐变效果背景代码,Css代码库,德仔网

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【Css】 CSS和javacript实现各种各样的渐变效果背景
作者:Dezai.CN / 发布于2011/6/11/ 863
<div><html>
<head>
<title>CSS和javacript实现各种各样的渐变效果背景</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 = <a>/*@cc_on!@*/false</a>;
 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;}
 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;}
 xmp{font:12px/12px "Courier New";background:#fff;color:#666; border:solid 1px #ccc;}
</style>
<body>
<div id="example1" class="example">www.dezai.cn</div>
 <div id="example2" class="example">免费模板网</div>
 <div id="example3" class="example">CSS模板</div>
 <div id="example4" class="example">css菜单</div>
 <div id="example5" class="example">css按钮</div>
 <div id="example6" class="example">CSS图表</div>
 <div id="example7" class="example">后台模板</div>
<div id="example8" class="example">图片图标</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);
setGradient('example7','white','black',1);
setGradient('example8','#eac87d','#8b4286',0);
</script>
</body>
</html></div>
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