function jtrim(txt){   var len = txt.length;   var i = 0;   var pos = 0;   var found_char = false;   var r = "";   for (i=0,pos=len; i<len; i++)      { if (txt.charAt(i) != ' ') { pos = i; break; } }   for (i=pos; i<len; i++)      { r += txt.charAt(i) }   txt = r;   len = txt.length;   r = "";   for (i=len-1,pos=-1; i>=0; i--)      { if (txt.charAt(i) != ' ') { pos = i; break; } }   for (i=0; i<=pos; i++)      { r += txt.charAt(i) }   return r;}function limit_string(txt, num, len){var i = 0;var r = "";for (i=0; i<num; i++){if (i == len) break;r += txt.charAt(i);}return r;}function jis_number_only(txt){   var len = txt.length;   var ch = '9';   var i = 0;   var r = true;   for (i=0; i<len; i++)   {      ch = txt.charAt(i);      if (! ( (ch>='0')&&(ch<='9') ) )      {         r = false;         break;      }   }   return r;}function jis_eng_and_number_only(txt){   var len = txt.length;   var ch = '9';   var i = 0;   var r = true;   for (i=0; i<len; i++)   {      ch = txt.charAt(i);      if (! ( ((ch>='a')&&(ch<='z'))||              ((ch>='A')&&(ch<='Z'))||              ((ch>='0')&&(ch<='9')) ) )      {         r = false;         break;      }   }   return r;}function check_email(email){   var len = email.length;   var ch = '9';   var i = 0;   var c = 0;    for (i=0; i<len; i++)   {      ch = email.charAt(i);      if (! ( ((ch>='a')&&(ch<='z'))||              ((ch>='A')&&(ch<='Z'))||              ((ch>='0')&&(ch<='9'))||   (ch=='_')||   (ch=='.')||               (ch=='-')||   (ch=='@') ) )      {         return false;      }   }   for (i=0; i<len; i++)   {      ch = email.charAt(i);      if (ch=='@')      {         c++;      }   }   if (c != 1) return false;   c = 0;   for (i=0; i<len; i++)   {      ch = email.charAt(i);      if (ch=='.')      {         c++;      }   }   if (c == 0) return false;   return true;}function get_file_ext(txt){var len = txt.length;var ext = '';var i = 0;for (i=0; i<len; i++){if (txt.charAt(i) == '.') break;}i++;while (i < len){ext += txt.charAt(i);i++;}return ext;}function gotoUrl(link){document.location = link;}