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CSS 渐变背景的6个演示代码

  作者：bea

<!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渐变背景</title> <script&


<!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渐变背景</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 id="example1" class="example">（）提供JavaScript/CSS特效代码。</div>
<div id="example2" class="example">各类编程源码、 </div>
<div id="example3" class="example">提供各类编程源码</div>
<div id="example4" class="example">（） </div>
<div id="example5" class="example"> </div>
<div id="example6" class="example"> </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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如需引入外部Js需刷新才能执行]



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