jQuery 颜色渐变动画效果

其实很简单，只要在javascript中写入:

$(document).ready(function(){  $('#disclaimer').animate({'backgroundColor':'#ff9f5f'}, 2000);});

即可，但是它需要下载一个js插件，如下所示：

/* * jQuery Color Animations * Copyright 2007 John Resig * Released under the MIT and GPL licenses. */(function(jQuery){// We override the animation for all of these color stylesjQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function(i,attr){jQuery.fx.step[attr] = function(fx){if ( fx.state == 0 ) {fx.start = getColor( fx.elem, attr );fx.end = getRGB( fx.end );}fx.elem.style[attr] = "rgb(" + [Math.max(Math.min( parseInt((fx.pos * (fx.end[0] - fx.start[0])) + fx.start[0]), 255), 0),Math.max(Math.min( parseInt((fx.pos * (fx.end[1] - fx.start[1])) + fx.start[1]), 255), 0),Math.max(Math.min( parseInt((fx.pos * (fx.end[2] - fx.start[2])) + fx.start[2]), 255), 0)].join(",") + ")";}});// Color Conversion functions from highlightFade// By Blair Mitchelmore// http://jquery.offput.ca/highlightFade/// Parse strings looking for color tuples [255,255,255]function getRGB(color) {var result;// Check if we're already dealing with an array of colorsif ( color && color.constructor == Array && color.length == 3 )return color;// Look for rgb(num,num,num)if (result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color))return [parseInt(result[1]), parseInt(result[2]), parseInt(result[3])];// Look for rgb(num%,num%,num%)if (result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(color))return [parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55];// Look for #a0b1c2if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))return [parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16)];// Look for #fffif (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))return [parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)];// Otherwise, we're most likely dealing with a named colorreturn colors[jQuery.trim(color).toLowerCase()];}function getColor(elem, attr) {var color;do {color = jQuery.curCSS(elem, attr);// Keep going until we find an element that has color, or we hit the bodyif ( color != '' && color != 'transparent' || jQuery.nodeName(elem, "body") )break; attr = "backgroundColor";} while ( elem = elem.parentNode );return getRGB(color);};// Some named colors to work with// From Interface by Stefan Petre// http://interface.eyecon.ro/var colors = {aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]};})(jQuery);

这样就可以有颜色的渐变动画效果了。