html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;font-size:100%;font:inherit;vertical-align:baseline}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}body{line-height:1}ol,ul{list-style:none}blockquote,q{quotes:none}blockquote:before,blockquote:after,q:before,q:after{content:"";content:none}table{border-collapse:collapse;border-spacing:0}body{font-family:"Georgia",serif;font-size:16px;line-height:20px;color:#252519}em{font-style:italic}a,a:visited{color:#000}h2{font-size:32px;line-height:40px;margin-top:40px;padding-bottom:20px}h2 a,h2 a:visited{text-decoration:none;color:#252519}div.example{width:640;min-width:640;max-width:640;margin-left:auto;margin-right:auto;margin-bottom:120px}.footer{padding-top:10px}.footer,.footer a,.footer a:visited{color:gray}div#intro{width:420px;min-width:420px;max-width:420px;margin-left:auto;margin-right:auto;margin-bottom:120px}p{padding-bottom:15px}div#intro p{padding-top:20px}div#intro ul{padding-top:20px}pre,code{font-size:13px;line-height:18px;font-family:"Menlo","Monaco","Consolas","Lucida Console",monospace;white-space:pre}pre{margin-top:10px;margin-bottom:10px}code{background-color:#e5e9f0}img.run{height:16px;width:16px;float:right}