1.写在body中的js <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>js基础-写在body中的js</title> <style type="text/css"> </style> </head> <body> <span>1.写在body中的js</span> <script type="text/javascript"> var x=5; var y=6; document.write(x+y);<!--结果输出在页面中document为文档节点--> </script> </body> </html>