function checkEmail(strTarget){
  if(strTarget.match(/[^a-zA-Z0-9_\.\-@]/)){ return false; }
  p=strTarget.indexOf("@",1);
  if(strTarget.length==p+1){ return false; }
  else{
    for(i=p+1;i<strTarget.length;i++){
    Charactor=strTarget.charAt(i);
      if(Charactor=="."){
        if(i==p+1 || i==strTarget.length-1){ return false; }
      }
      else if(Charactor=="@"){ return false; }
    }
  }

  atPos = strTarget.indexOf("@",1)
  if(atPos == -1) { return false; }

  if(strTarget.indexOf("@", atPos+1) != -1) { return false; }

  periodPos = strTarget.indexOf(".",atPos)
  if(periodPos == -1) { return false; }
}

function checkHankaku(strTarget){
var char_length=("あ".length); //規準length の取得
var i, charTarget, transTarget;
	transTarget=strTarget.replace(/[ 　]/g, "");
	for(i=0;i<transTarget.length;i=i+char_length){
		charTarget=transTarget.charAt(i);
		if(charTarget >= "｡" && charTarget <= "ﾟ"){
			return false;
		}
	}
	return true;
}

function formStrCheck() {
  var error_string = "";
  var loop = "";

  if((document.forms[0].kana1.value == "") || (document.forms[0].kana2.value == "")) {
    error_string += "・フリガナ\n";
  }
  else {
    if((checkHankaku(document.forms[0].kana1.value) == false) || (checkHankaku(document.forms[0].kana2.value) == false)) {
      error_string += "※「フリガナ」に半角カタカナは入力できません\n";
    }
  }

  if((document.forms[0].name1.value == "") || (document.forms[0].name2.value == "")) {
    error_string += "・お名前\n";
  }
  else {
    if((checkHankaku(document.forms[0].name1.value) == false) || (checkHankaku(document.forms[0].name2.value) == false)) {
      error_string += "「お名前」に半角カタカナは入力できません\n";
    }
  }
  
  var sex_chk = "100";
  for (var loop = 0; loop < window.document.forms[0].sex.length; loop++) {
    if (window.document.forms[0].sex[loop].checked == true) {
      sex_chk = 1;
    }
  }
  if(sex_chk != 1) {
    error_string += "・性別\n";
  }
  
  if(((document.forms[0].birthyear.value == "") || (document.forms[0].birthmonth.value == "")) || (document.forms[0].birthday.value == "")) {
    error_string += "・生年月日\n";
  }

  if((document.forms[0].address1.value == "") || (document.forms[0].address2.value == "")) {
    error_string += "・住所\n";
  }

  if(((document.forms[0].tel1.value == "") || (document.forms[0].tel2.value == "")) || (document.forms[0].tel3.value == "")) {
    error_string += "・電話番号\n";
  }


  
  if((document.forms[0].email.value == "") || (document.forms[0].email2.value == "")) {
    error_string += "・Eメール\n";
  }
  else {
    var mail = document.forms[0].email.value;
    var mail_chk = document.forms[0].email2.value;
    
    if(mail != mail_chk) {
      error_string += "※「Eメール」が確認用と一致しません\n";
    }
    else {
      if(checkEmail(mail) == false) {
        error_string += "※「Eメール」を正しく入力して下さい\n";
      }
    }
  }

//  var afterhours_chk = "100";
//  for (var loop = 0; loop < document.forms[0].afterhours.length; loop++) {
//    if (document.forms[0].afterhours[loop].checked == true) {
//     afterhours_chk = 1;
//    }
//  }
//  if(afterhours_chk != 1) {
//    error_string += "・懇談会への参加\n";
//  }
  
  if (error_string == "") {
    return true;
  } else {
    error_string = "以下の項目をご確認下さい。\n" + error_string;
    alert (error_string);
    return false;
  }
}