JS+CSS 各浏览器渐变
style.js
a.html
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;
};
}
}
})();
a.html
<script>
function style(){
setGradient('body1','#b0d6f1','#8ebfeb',0);
//容器ID，开始颜色，结束颜色，0=垂直1=水平
}
</script>
<body id="body1" onload="style()">
</body>