梦之都
JavaScript教程
Math.abs
函数示例
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>JavaScript Math.abs() 函数示例</title> </head> <body> <script type="text/javascript"> document.write(Math.abs(6)); document.write("<br />"); document.write(Math.abs(-6)); </script> </body> </html>