function emptyDefault (emailStr) {
	if(emailStr.value == "Your Email") {
		emailStr.value = "";
	}
}

function restoreDefault (emailStr) {
	if(emailStr.value == "") {
		emailStr.value = "Your Email";
	}
}

function notifyEmail (that) {
	if (emailCheck(that.ur_email.value))
		return true;
	else {
		that.ur_email.focus();
		return false;
	}
	
}

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("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)
		{
		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!"
		alert(errStr)
		return false
		}

	return true;
	}

function trim(inputString)
	{
	var retValue = inputString;
	var ch = retValue.substring(0, 1);
	while (ch == " ")
		{
		retValue = retValue.substring(1, retValue.length);
		ch = retValue.substring(0, 1);
		}
	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ")
		{
		retValue = retValue.substring(0, retValue.length-1);
		ch = retValue.substring(retValue.length-1, retValue.length);
		}
	while (retValue.indexOf("  ") != -1)
		{
		retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
		}

	return retValue;
	}