梦之都
JavaScript教程
JavaScript break语句
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 break语句示例</title> </head> <body> <script type="text/javascript"> var sUrl = "www.dreamdu.com"; var iLength = sUrl.length; var iPos = 0; for(var i=0;i<iLength;i++) { if(sUrl.charAt(i)=="d") //判断表达式2 { iPos=i+1; break; } } document.write("字符串"+sUrl+"中的第一个d字母的位置为"+iPos); </script> </body> </html>