how to make: require root password to shutdown / normal user cannot shutdown

Hello. I miss the good old days on almost every Linux that normal users cannot shutdown the machine. I have a SuSE 10.1 installation which has to be on for all the time. Every user go to click 'Desktop' -> 'Logout', then, instead of given this dialog: gopher://sdf.lonestar.org/I/users/weiwu/logout_prompt_1.png This dialog is given: gopher://sdf.lonestar.org/I/users/weiwu/logout_prompt_2.png What I want is dialog 1. What I have is dialog 2. Can I achieve it? -- 锐业软服（国内业务） http://www.realss.cn Real SoftService http://www.realss.com 销售咨询(Sales Department): 0086 592 20 99987 (Chinese, German, English) 国际业务(International Sales): 0086 10 8460 6011 (German and English) 联系：厦门大学科技园，嘉庚二号楼6楼 邮政：厦门大学2312号信箱（邮编361005）