// JavaScript Document
//***************************************************************


// **************************************************************

function getHTTPObject()
{
if (window.ActiveXObject)
return new ActiveXObject("Microsoft.XMLHTTP");
else if (window.XMLHttpRequest)
return new XMLHttpRequest();
else
{
alert("Your browser does not support AJAX.");
return null;
}
}

// **************************************************************

function delay(del){
var t=setTimeout("dummy()",del);
}
function dummy(){
	alert("in dummy");	
}
// **************************************************************
function trim(str)
{
   return str.replace(/^\s+|\s+$/g,'');
}
// **************************************************************

function checkEmail(emField){ //reference to email string passed as argument

var fieldValue = emField // store field's entire value in variable
var errmsg = "Please enter a valid Email address";
// Begin Valid Email Address Tests

//if field is not empty
if(fieldValue != ""){
	var atSymbol = 0

//loop through field value string
	for(var a = 0; a < fieldValue.length; a++){

//look for @ symbol and for each @ found, increment atSymbol variable by 1
	if(fieldValue.charAt(a) == "@"){
		atSymbol++
	}	
}
// if more than 1 @ symbol exists
if(atSymbol > 1){
// then cancel and don't submit form
	alert(errmsg)
	return false
	}
// if 1 @ symbol was found, and it is not the 1st character in string
if(atSymbol == 1 && fieldValue.charAt(0) != "@"){
//look for period at 2nd character after @ symbol
	var period = fieldValue.indexOf(".",fieldValue.indexOf("@")+2)

// "." immediately following 1st "." ?
	var twoPeriods = (fieldValue.charAt((period+1)) == ".") ? true : false

//if period was not found OR 2 periods together OR field contains less than 5 characters OR period is in last position
	if(period == -1 || twoPeriods || fieldValue.length < period + 2 || fieldValue.charAt(fieldValue.length-1)=="."){
// then cancel and don't submit form
		alert(errmsg)
		return false
		}
	}
// no @ symbol exists or it is in position 0 (the first character of the field)
	else{
	// then cancel and don't submit form
		alert(errmsg)
		return false
		}
	}
// if field is empty
else{
// then cancel and don't submit form
	alert(errmsg)
	return false
}

//all tests passed, submit form
//alert("VALID EMAIL ADDRESS!")
return true
}

// **************************************************************