function mailchk (emailStr) {

	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)

	if (matchArray==null) {
		//alert("Email address seems incorrect (check @ and .'s)")
		return false
	}

	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
		//alert("The username doesn't seem to be valid.")
		return false
	}

	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		// this is an IP address
		  for (var i=1;i<=4;i++) {

			if (IPArray[i]>255) {

				//alert("Destination IP address is invalid!")

			return false

			}

		}

		return true

	}

	var domainArray=domain.match(domainPat)

	if (domainArray==null) {
		//alert("The domain name doesn't seem to be valid.")
		return false

	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length

	if (domArr[domArr.length-1].length<2 || 
		domArr[domArr.length-1].length>3) {
	   //alert("The address must end in a three-letter domain, or two letter country.")
	   return false

	}

	if (len<2) {
	   //var errStr="This address is missing a hostname!"
	   return false

	}

	return true;

}



function check_numbers() {
	if(event.keyCode < 48 || event.keyCode > 57) event.returnValue = false;
}



function check() {
	var string_error,error;
	error = 0;
	var arr=new Array("name","site","url","mail","userdigit");

	for (f=0;f<arr.length;f++) {
		if (document.getElementById(arr[f]).value.length==0) {
			error=1;
		}
	}

	if (error==1) {

		alert ("管理者のお名前、サイトの名称、サイトのURL、認証コードの欄は必ずご記入ください");

	} else {

		if (mailchk(document.form1.mail.value)==false) {
			alert ("入力されたメールが正しくありません");

		} else {

			execute();

		}

	}

}



function execute() {   
	var str = Form.serialize('form');
	new Ajax.Request(   
		"imgchk.php",   

		{   
			"method": "post",   
			"parameters": str,   

			onSuccess: function(request) {
				if(request.responseText == "Match"){
					document.form1.submit();

				}else{

					alert('認証コードが正しくありません');
					document.getElementById("userdigit").value = "";

				}

			}

		}

	);

}



function reload() {

	document.getElementById("form1").action = "form.php";
	document.form1.submit();

}



function clearform() {

	document.getElementById("form1").action = "form.php";
	document.getElementById("method").value = "reset";
	document.form1.submit();
}