类似Alexa、whois等显示相关网站的截图功能 可以根据输入的网址进行截屏，截屏的尺寸可以在snap.cs中设置 把鼠标放到链接地址上显示缩略图等都是依据该原理-Similar to Alexa, whois and other show-related Web site screenshot function can be carried out in accordance with the URLs entered Screenshots, Screenshots snap.cs