// JavaScript Document
function isCode(str){//检测输入是否含非法字段
     for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if(midstr == "'" || midstr == "`" || midstr == "~" || midstr == "！" || midstr == "!" || midstr == "@"){
             return false;
             break;
          }else if(midstr == "#" || midstr == "%" || midstr == "^" || midstr == "&" || midstr == "*" || midstr == "("){
             return false;
             break;
          }else if(midstr == ")" || midstr == "+" || midstr == "=" || midstr == "[" || midstr == "]" || midstr == "{"){
             return false;
             break;
          }else if(midstr == "}" || midstr == ";" || midstr == ":" || midstr == "," || midstr == "，" || midstr == "."){
             return false;
             break;
          }else if(midstr == "。" || midstr == "/" || midstr == "？" || midstr == "|"){
             return false;
             break;
          }
      }
      return true;
}

function isCode2(str){//检测输入是否含非法字段
     for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if(midstr == "'" || midstr == "`" || midstr == "~" || midstr == "！" || midstr == "!" || midstr == "@"){
             return false;
             break;
          }
      }
      return true;
}

function isDigit(str){//检测输入是否数字
     for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if(midstr != "-" && (midstr < "0" || midstr > "9")){
             return false;
             break;
          }
      }
      return true;
}

function isDigit2(str){//检测输入是否数字
     for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if(midstr < "0" || midstr > "9"){
             return false;
             break;
          }
      }
      return true;
}

function isDouhao(str){//检测输入是否数字
    for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if(midstr == "," || midstr == "，" || midstr == "，" ){
             return false;
             break;
          }
      }
      return true;
}

function isEmail(str){//检测输入是否email
     for(i=0;i<str.length;i++){
          var midstr=str.substring(i,i+1);
          if((midstr >= "a" && midstr <= "z") || (midstr >= "A" && midstr <= "Z") || (midstr >= "0" && midstr <= "9") || midstr == "@" || midstr == "." || midstr == "_"){
             ;
          }else{
             return false;
             break;
          }
      }
      return true;
}