//函 数 名：chkemail
//功能介绍：检查是否为合法的Email Address
function chkemail(checkStr) {
  var checkOK = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@._-";
  var allValid = false;
  var checkCode = 0;
  for (i = 0; i < checkStr.length; i++) {
    ch = checkStr.charAt(i);
    if (ch == "@") {
      if (checkCode == 0 && i > 0) {
        checkCode = 1;
      } else {
        break;
      }
    }
    if (ch == ".") {
      if (i == 0 || i == checkStr.length - 1) {
        break;
      } else if (checkStr.charAt(i+1) == '.') {
        break;
      } else if (checkCode == 0) {
        if (checkStr.charAt(i+1) == '@') {
          break;
        }
      } else if (checkCode == 1) {
        if (checkStr.charAt(i-1) == '@') {
          break;
        } else {
          checkCode = 2;
        }
      }
    }
    chValid = false;
    for (j = 0; j < checkOK.length; j++) {
      if (ch == checkOK.charAt(j)) {
        chValid = true;
        break;
      }
    }
    if (!chValid) break;
    if (i == checkStr.length - 1 && checkCode == 2) {
      allValid = true;
      break;
    }
  }
  return(allValid);
}

//函 数 名：checkphone
//功能介绍：检查是否为电话号码
function chkphone(checkStr) {
  var checkOK = "0123456789-()# ,;:";
  return(chkstring(checkStr, checkOK));
}
//函 数 名：chksafe
//功能介绍：检查是否含有&;`'\"|*?~<>^()[]{}$\n\r
function chksafe(checkStr) {
  var allValid = true;
  var forbidStr = new Array ("&", ";", "`", "'", "\"", "|", "*", "?", "~", "<", ">", "^", "(", ")", "[", "]", "{", "}", "$", "\n", "\r");
  m = forbidStr.length;
  n = checkStr.length;
  for (i=0; i<m; i++) {
    for (j=0; j<n; j++) {
      ch1 = checkStr.charAt(j);
      ch2 = forbidStr[i];
      if (ch1 == ch2) {
        allValid = false;
        break;
      }
    }
  }
  return(allValid);
}
//函 数 名：chknumber
//功能介绍：检查是否为数字
function chknumber(checkStr) {
  var checkOK = "0123456789.+-";
  var allValid = true;
  var checkCode = 0;
  for (i = 0; i < checkStr.length; i++) {
    ch = checkStr.charAt(i);
    if (checkOK.indexOf(ch) == -1) {
      allValid = false;
      break;
    }
    if ((ch == '+' || ch == '-') && i > 0) {
      allValid = false;
      break;
    }
    if (ch == '.') {
      checkCode += 1;
      if (checkCode > 1) {
        allValid = false;
        break;
      }
    }
  }
  return(allValid);
}
//函 数 名：keydown
//功能介绍：检查是否为数字并且控制数字在16-60之间；


function keydown(checkName,aNum,bNum){
var src=checkName;
if(parseInt(src.value,10)>=aNum &&parseInt(src.value,10)<=bNum ) return true;
else return false;
}