function passRequired(thisForm){                               
   if (thisForm.username.value.indexOf('\'') != -1){                               
  alert("输入用户名错误!不能含有单引号!");                               
  thisForm.username.focus()                               
   return false                               
  }                                                        
   if (thisForm.password.value.indexOf('\'') != -1){                               
  alert("输入密码错误!不能含有单引号!");                               
  thisForm.password.focus()                               
   return false                               
  }                                                        
 return true                               
 }                               

  function cl(level,url){ 
  document.logon.ulevel.value=level;
  document.logon.gourl.value=url;
  }