仿新浪微博上传头像组件 1.上传并预览，用户可以任意选择区域，支持头像旋转 2.无论图片过大还是过小，都可以按照固定大小显示 3.支持头像拍照保存 4.支持Asp/php/Jsp/Asp.Net等语言的任意调用 5.兼容性好，任何浏览器都正常使用-1. upload and preview, the user can　the region, support the picture rotation 2. regardless of the picture is too large or too small, can be displayed in accordance with the fixed size 3. support avatar photo save 4. support Asp/php /Jsp/Asp.Net language such as any call 5. Compatibility is good, any browser is normal use