function checkUserLogin(userlogin){
with(userlogin){
      user_id.value = strim(user_id.value);
      user_pass.value = strim(user_pass.value);

      if(inerr(user_id,"Please enter your ID.")){
        return false;
      }

      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(user_id.value)) {
       alert("Your login ID contains invalid character(s). Please check it and login again.");
       user_id.focus();
      return false;
      }

     
      if(inerr(user_pass,"Please enter your password.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(user_pass.value)) {
       alert("Your password contains invalid character(s). Please check it and login again.");
       user_pass.focus();
      return false;
      } 
      
}
}



function checkRegForm(reg){
with(reg){
var filter=/^.+@.+\..{2,3}$/
         s_name.value = strim(s_name.value);
         s_login_id.value = strim(s_login_id.value);
         s_login_pass.value = strim(s_login_pass.value);
         s_login_pass2.value = strim(s_login_pass2.value);

         s_nationality.value = strim(s_nationality.value);
         s_sex.value = strim(s_sex.value);                           
 
         s_tel.value = strim(s_tel.value);
         s_cell.value = strim(s_cell.value);
         s_email.value = strim(s_email.value);

              
    if(inerr(s_name,"Please input your name. (Example: Peter Chou)")){
        return false;
      }
      
      if ((contain(s_name.value, "'~!@$%^-_&*=+|}{[];:,.?/`%\(\)><")))
      {
       alert("Your name contains invalid characters.");
       s_name.focus();
       return false;
      }
     
    if(inerr(s_login_id,"Please input login ID.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_id.value)) {
       alert("Your login ID contains invalid character(s). Please check it and login again.");
       s_login_id.focus();
      return false;
      }

      if(StrLen(s_login_id.value)>20 || StrLen(s_login_id.value)<6){
      alert('6 to 20 characters allowed for login ID.');
      s_login_id.focus();
      return false;      
      }

      if(inerr(s_login_pass,"Please input login password.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_pass.value)) {
       alert("Your login password contains invalid character(s). Please check it and login again.");
       s_login_pass.focus();
      return false;
      }
      
      if(StrLen(s_login_pass.value)>20 || StrLen(s_login_pass.value)<6){
      alert('6 to 20 characters allowed for password.');
      s_login_pass.focus();
      return false;      
      }
      
      if(inerr(s_login_pass2,"Please input login password again.")){
        return false;
      }      
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_pass2.value)) {
       alert("Your login password contains invalid character(s). Please check it and login again.");
       s_login_pass2.focus();
      return false;
      }
      
      if(StrLen(s_login_pass2.value)>20 || StrLen(s_login_pass2.value)<6){
      alert('6 to 20 characters allowed for password.');
      s_login_pass2.focus();
      return false;      
      }

      if(s_login_pass2.value!=s_login_pass.value){alert('The confirm password is not same as the login password.\nPlease check it and input again.');
         s_login_pass2.focus();
         return false;}      
         
      if(inerr(s_nationality,"Please input your nationality.")){
        return false;
      }         
          
      
      if(s_sex.value=='unknown'){
        alert("Please select your gender.");
        s_sex.focus();
        return false;
      }      
     
      if(inerr(s_tel,"Please input telephone number.")){
        return false;
      } 

      if(inerr(s_cell,"Please input cell phone number.")){
        return false;
      } 
     
     if((s_tel.value=="" || s_tel.value==null) && (s_cell.value=="" || s_cell.value==null)){
        alert('Telephone and cell phone number is required. You have to input at least one.');
        s_tel.focus();
        return false;
     }
     
     
      if(inerr(s_email,"Please input your E-mail.")){
        return false;
      } 


      if (!filter.test(s_email.value))
          {
          alert('Please input a valid E-mail.');
          s_email.focus();
          return false;
          }


}
}





function checkJoinForm(reg){
with(reg){
var filter=/^.+@.+\..{2,3}$/
         merchantID.value = strim(merchantID.value);
         loginPassword.value = strim(loginPassword.value);
         confirmloginPassword.value = strim(confirmloginPassword.value);
         username.value = strim(username.value);

         sex.value = strim(sex.value); 
         city.value = strim(city.value);
                          
 
         tel.value = strim(tel.value);
         email.value = strim(email.value);



    if(inerr(merchantID,"Please input a Merchant ID.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(merchantID.value)) {
       alert("Your Merchant ID contains invalid character(s). Please check it and login again.");
       merchantID.focus();
       return false;
      }

      if(StrLen(merchantID.value)>20 || StrLen(merchantID.value)<6){
      alert('6 to 20 characters allowed for login ID.');
      merchantID.focus();
      return false;      
      }





     if(inerr(loginPassword,"Please input login password.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(loginPassword.value)) {
       alert("Your login password contains invalid character(s). Please check it and login again.");
       loginPassword.focus();
      return false;
      }
      
      if(StrLen(loginPassword.value)>20 || StrLen(loginPassword.value)<6){
      alert('6 to 20 characters allowed for password.');
      m_pass.focus();
      return false;      
      }
      
      if(inerr(confirmloginPassword,"Please input login password again.")){
        return false;
      }      
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(confirmloginPassword.value)) {
       alert("Your login password contains invalid character(s). Please check it and login again.");
       confirmloginPassword.focus();
      return false;
      }
      
      if(StrLen(confirmloginPassword.value)>20 || StrLen(confirmloginPassword.value)<6){
      alert('6 to 20 characters allowed for password.');
      confirmloginPassword.focus();
      return false;      
      }

      if(confirmloginPassword.value!=loginPassword.value){alert('The confirm password is not same as the login password.\nPlease check it and input again.');
         confirmloginPassword.focus();
         return false;}



              
    if(inerr(username,"Please input your name. (Example: Peter Chou)")){
        return false;
      }
      
      if ((contain(username.value, "'~!@$%^-_&*=+|}{[];:,?/`%\(\)><")))
      {
       alert("Your name contains invalid characters.");
       username.focus();
       return false;
      }
     



      if(sex.value=='unknown'){
        alert("Please select your gender.");
        sex.focus();
        return false;
      } 


     
         
      if(inerr(city,"Please input your city.")){
        return false;
      }         
          
           
     
      if(inerr(tel,"Please input telephone number.")){
        return false;
      } 

     
      if(inerr(email,"Please input your E-mail.")){
        return false;
      } 


      if (!filter.test(email.value))
          {
          alert('Please input a valid E-mail.');
          email.focus();
          return false;
          }

      
}
}


function check_merID(reg){
with(reg){
     merchantID.value = strim(merchantID.value);

    if(inerr(merchantID,"Please input a Merchant ID.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(merchantID.value)) {
       alert("Your Merchant ID contains invalid character(s). Please check it and login again.");
       merchantID.focus();
       return false;
      }

      if(StrLen(merchantID.value)>20 || StrLen(merchantID.value)<6){
      alert('6 to 20 characters allowed for login ID.');
      merchantID.focus();
      return false;      
      }
      

window.open ('join_check_merID.asp?merID='+merchantID.value+'','','scrollbars=no,resizable=no,menubar=no,width=450,height=110,top=250,left=300');
}
}




function checkQuestionTitle(mr){
with(mr){
     uq_title.value = strim(uq_title.value);

    if(inerr(uq_title,"Please input question title.")){
        return false;
      }

      if ((contain(uq_title.value, "'~@$%^&*=+|}{[]/`%\(\)><")))
      {
       alert("Your question title contains invalid characters.");
       uq_title.focus();
       return false;
      }
}
}




function checkmailbox(studentMsg){
with(studentMsg){
     mb_title.value = strim(mb_title.value);
     sender_name.value = strim(sender_name.value);

    if(inerr(mb_title,"Please input message title.")){
        return false;
      }

      if ((contain(mb_title.value, "'~@$%^&*=+|}{[]/`%\(\)><")))
      {
       alert("Message title contains invalid characters.");
       mb_title.focus();
       return false;
      }

    if(inerr(sender_name,"Please input receiver ID.")){
        return false;
      }

      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(sender_name.value)) {
       alert("Receiver ID contains invalid character(s). Please check it and login again.");
       sender_name.focus();
      return false;
      }

}
}





function check_s_login_ID(reg){
with(reg){
     s_login_id.value = strim(s_login_id.value);

    if(inerr(s_login_id,"Please input login ID.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z\_]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_id.value)) {
       alert("Your login ID contains invalid character(s). Please check it and login again.");
       s_login_id.focus();
      return false;
      }

      if(StrLen(s_login_id.value)>20 || StrLen(s_login_id.value)<6){
      alert('6 to 20 characters allowed for login ID.');
      s_login_id.focus();
      return false;      
      }
      

window.open ('http://www.tlichinaonline.com/Eng/student_check_loginID.asp?s_login_id='+s_login_id.value+'','','scrollbars=no,resizable=no,menubar=no,width=450,height=110,top=250,left=300');

}
}




function checkSmodifyPass(mr){
with(mr){

         s_login_pass.value = strim(s_login_pass.value);
         s_login_pass2.value = strim(s_login_pass2.value);
         s_login_pass3.value = strim(s_login_pass3.value);



      if(inerr(s_login_pass,"Please input your current login password.")){
        return false;
      }
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_pass.value)) {
       alert("Your current login password contains invalid character(s). Please check it and login again.");
       s_login_pass.focus();
      return false;
      }
      
      if(StrLen(s_login_pass.value)>20 || StrLen(s_login_pass.value)<6){
      alert('6 to 20 characters allowed for password.');
      s_login_pass.focus();
      return false;      
      }
      
      if(inerr(s_login_pass2,"Please input new login password.")){
        return false;
      }      
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_pass2.value)) {
       alert("New login password contains invalid character(s). Please check it and login again.");
       s_login_pass2.focus();
      return false;
      }
      
      if(StrLen(s_login_pass2.value)>20 || StrLen(s_login_pass2.value)<6){
      alert('6 to 20 characters allowed for password.');
      s_login_pass2.focus();
      return false;      
      }



      if(inerr(s_login_pass3,"Please input new login password again.")){
        return false;
      }      
      
      var regu = "^[0-9a-zA-Z]+$";
      var re = new RegExp(regu);
      if (!re.test(s_login_pass3.value)) {
       alert("Confirm password contains invalid character(s). Please check it and login again.");
       s_login_pass3.focus();
      return false;
      }
      
      if(StrLen(s_login_pass3.value)>20 || StrLen(s_login_pass3.value)<6){
      alert('6 to 20 characters allowed for password.');
      s_login_pass3.focus();
      return false;      
      }



      if(s_login_pass2.value!=s_login_pass3.value){alert('The confirm password is not same as the new login password.\nPlease check it and input again.');
         s_login_pass3.focus();
         return false;}      
         

}
}



function checkSmodifyForm(reg){
with(reg){
var filter=/^.+@.+\..{2,3}$/
         s_name.value = strim(s_name.value);
         s_nationality.value = strim(s_nationality.value);
         s_sex.value = strim(s_sex.value);                           
         s_tel.value = strim(s_tel.value);
         s_cell.value = strim(s_cell.value);
         s_email.value = strim(s_email.value);

              
    if(inerr(s_name,"Please input your name. (Example: Peter Chou)")){
        return false;
      }
      
      if ((contain(s_name.value, "'~!@$%^-_&*=+|}{[];:,.?/`%\(\)><")))
      {
       alert("Your name contains invalid characters.");
       s_name.focus();
       return false;
      }
       
         
      if(inerr(s_nationality,"Please input your nationality.")){
        return false;
      }         
          
      
      if(s_sex.value=='unknown'){
        alert("Please select your gender.");
        s_sex.focus();
        return false;
      }      
     
      if(inerr(s_tel,"Please input telephone number.")){
        return false;
      } 

      if(inerr(s_cell,"Please input cell phone number.")){
        return false;
      } 
     
     if((s_tel.value=="" || s_tel.value==null) && (s_cell.value=="" || s_cell.value==null)){
        alert('Telephone and cell phone number is required. You have to input at least one.');
        s_tel.focus();
        return false;
     }
     
     
      if(inerr(s_email,"Please input your E-mail.")){
        return false;
      } 


      if (!filter.test(s_email.value))
          {
          alert('Please input a valid E-mail.');
          s_email.focus();
          return false;
          }

  

}
}