function validateemail(Email){
    if(trim(Email) == "")
      return false;
    if(Email.indexOf("@") == -1 || Email.indexOf(".") == -1 || Email.indexOf("\\") > -1 || Email.indexOf("/") > -1 || Email.indexOf(" ") > -1)
      return false;

    return true;
  }  

  function trim(sString){
    while (sString.substring(0,1) == ' '){
      sString = sString.substring(1, sString.length);
    }

    while (sString.substring(sString.length-1, sString.length) == ' '){
      sString = sString.substring(0,sString.length-1);
    }
    return sString;
  }