Highcharts是一个制作图表的纯Javascript类库，主要特性如下：
- 兼容性：兼容当今所有的浏览器，包括iPhone、IE和火狐等等；
- 对个人用户完全免费；
- 纯JS，无BS；
- 支持大部分的图表类型：直线图，曲线图、区域图、区域曲线图、柱状图、饼装图、散布图；
- 跨语言：不管是PHP、Asp.net还是Java都可以使用，它只需要三个文件：一个是Highcharts的核心文件highcharts.js，还有a canvas emulator for IE和Jquery类库或者MooTools类库；
- 提示功能：鼠标移动到图表的某一点上有提示信息；
- 放大功能：选中图表部分放大，近距离观察图表；
- 易用性：无需要特殊的开发技能，只需要设置一下选项就可以制作适合自己的图表；
- 时间轴：可以精确到毫秒；
Highcharts 2.2.5 发布了，下载地址：Highcharts 2.3.3
该版本主要是 bug 修复，详细记录包括：
Version 2.3.3 (2012-10-04)
- Refactored data label alignment logic for better maintainabilit. Issue #1168. Issue #1212.
- Worked around label positioning problem in IE9 and IE10. Issue #1101.
- Fixed gauge series data labels after regression testing
- Fixed issue with yAxis labels with a minus prefix being wrapped into two lines. Issue #1273.
- Fixed JS errors on continuously destroying charts in window.resize. Issue #1257.
- Fixed orphaned marker after Point.update to null. Issue #1269.
- Fixed issue with text wrapping and bounding boxes in Android 2. Issue #1140.
- Worked around Safari 6 bug causing disappearing pie slices. Issue #1208.
- Fixed wrong positions of polar column chart data labels. Issue #1199.
- Fixed error in VML browsers when redrawing a chart with an image background. Issue #1245.
- Fixed issue with shadow.offsetX and shadow.offsetY set to 0 being replaced by 1. Issue #1224.
- Fixed text rotation with useHTML in Firefox 15. Issue #916.
- Fixed issue with tooltip spilling out to the left in inverted chart. Issue #1231.
- Fixed issue with null points in stacked columns on a logarithmic scale. Issue #1232.
- Fixed issue with colors and borderWidth not being applied to individual dials in gauges.
- Use point.name in the tooltip header even on datetime axis. Issue #976.
- Fixed JavaScript errors in Firefox 3.6 when displaying the tooltip. Issue #1236.
- Fixed floating number errors in stack totals. Issue #1223.
- Fixed issue in 2.3 with the sizing of linked axes. Issue #84.
- Fixed issue with span styles not being applied across line breaks in SVGRenderer. Issue #390.
- Fixed issue with series marker options not being reflected in the legend symbol. Issue #674.
