1<!DOCTYPE html> 2<html> 3 4<head> 5 <style> 6 #content { 7 background: silver; 8 width: 1000px; 9 height: 1000px; 10 } 11 </style> 12<head> 13 14<body> 15 <div id="content"></div> 16</body> 17 18</html> 19