<!--

var errmsg = "Bitte geben Sie eine korrekte eMail-Adresse ein.";

function emailCheck (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(errmsg);
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null) {

	alert(errmsg);
	return false
}

var IPArray=domain.match(ipDomainPat)

if (IPArray!=null) {
	  for (var i=1;i<=4;i++) {

	    if (IPArray[i]>255) {

		alert(errmsg);
		return false
	    }
	}

    return true
}

var domainArray=domain.match(domainPat)
if (domainArray==null) {

	alert(errmsg);
	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>4) {

	alert(errmsg);
	return false
}

if (len<2) {

	alert(errmsg);
	return false
}


return true;
}


//-->