function checkEmail(form){

	var email=document.mail.email.value;

	if (!isEmail(email)){

		alert("Wrong E-mail address");

		return false;

	}

	else {return true; }	

}



function isEmail(str) {

  var supported = 0;

  if (window.RegExp) {

    var tempStr = "a";

    var tempReg = new RegExp(tempStr);

    if (tempReg.test(tempStr)) supported = 1;

  }

  if (!supported) 

  return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);

  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");

  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");

  return (!r1.test(str) && r2.test(str));

}