//下面是用户注册验正-----------------------------------------------------------------------------------------------------------------

function IsDigit(cCheck)      
 {      
 return (('0'<=cCheck) && (cCheck<='9'));      
 }      
      
function IsAlpha(cCheck)      
 {      
 return ((('a'<=cCheck) && (cCheck<='z')) || (('A'<=cCheck) && (cCheck<='Z')))      
 }               
       
function IsaNull(cCheck)           
 {           
 return(cCheck != " ")          
 }                                
       
function checkform()      
{  
  
  id = document.form.userid.value;      
 if (id == "")      
  {      
  alert("请输入会员帐号");      
  document.form.userid.focus();      
  return false;      
  }      
      
 for (nIndex=0; nIndex<id.length; nIndex++)      
  {      
  cCheck = id.charAt(nIndex);      
  if (!(IsDigit(cCheck) || IsAlpha(cCheck) || cCheck=='_'))      
   {      
   alert("会员帐号只能使用字母、数字、下划线,并且不能使用中文");      
   document.form.userid.focus();      
   return false;      
   }      
  }  
 userpd = document.form.userpd.value;      
 if (userpd == "")      
  {      
  alert("请输入登录密码");      
  document.form.userpd.focus();      
  return false;      
  }  
 userpd2 = document.form.userpd2.value;      
 if (userpd>userpd2)      
  { 
     alert("重复密码与登录密码不相同");      
  document.form.userpd.focus();  
  document.form.userpd2.focus();      
  return false; 
  }   
if (userpd<userpd2)      
  { 
     alert("重复密码与登录密码不相同");      
  document.form.userpd.focus();  
  document.form.userpd2.focus();      
  return false; 
  }  
    
  return true;      
      
}  

//下面是用户登录验正-----------------------------------------------------------------------------------------------------------------

function checklog()      
{  
  id = document.formlog.userid.value;      
 if (id == "")      
  {      
  alert("请输入会员帐号");      
  document.formlog.userid.focus();      
  return false;      
  }    
   for (nIndex=0; nIndex<id.length; nIndex++)      
  {      
  cCheck = id.charAt(nIndex);      
  if (!(IsDigit(cCheck) || IsAlpha(cCheck) || cCheck=='_'))      
   {      
   alert("会员帐号只能使用字母、数字、下划线,并且不能使用中文");      
   document.formlog.userid.focus();      
   return false;      
   }      
  }      
 userpd = document.formlog.userpd.value;      
 if (userpd == "")      
  {      
  alert("请输入登录密码");      
  document.formlog.userpd.focus();      
  return false;      
  }     
  return true;      
      
} 

//下面是修改密码验正-----------------------------------------------------------------------------------------------------------------

function checkpass()      
{  
 userpd = document.form.userpd.value;      
 if (userpd == "")      
  {      
  alert("请输入旧密码");      
  document.form.userpd.focus();      
  return false;      
  }  
  userpd1 = document.form.userpd1.value;      
 if (userpd1 == "")      
  {      
  alert("请输入新密码");      
  document.form.userpd1.focus();      
  return false;      
  } 
  userpd2 = document.form.userpd2.value;      
 if (userpd2 == "")      
  {      
  alert("请输入确认新密码");      
  document.form.userpd2.focus();      
  return false;      
  } 
     
 if (userpd1>userpd2)      
  { 
     alert("新密码与确认新密码不相同");      
  document.form.userpd2.focus();      
  return false; 
  }   
if (userpd1<userpd2)      
  { 
     alert("新密码与确认新密码不相同");      
  document.form.userpd2.focus();      
  return false; 
  }  
  return true;       
}  

//下面是搜索验正-----------------------------------------------------------------------------------------------------------------

function checksearch()      
{  
 kword = document.formsearch.kword.value;      
 if (kword == "") 
  {      
  alert("请输入搜索关键词...");      
  document.formsearch.kword.focus();      
  return false;      
  }     
  return true;      
} 

//下面是餐馆加盟验正-----------------------------------------------------------------------------------------------------------------

function checkms()      
{  
 title = document.form.title.value;      
 if (title == "") 
  {      
  alert("请输入餐馆名称...");      
  document.form.title.focus();      
  return false;      
  }     
  return true;      
}