// correct format for email address
function IsEmailAddress (string)
{
	var addressPattern = 
		/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
	return addressPattern.test(string);
}

// radio button selection
function IsRadioSelected(theForm, name)
{
	var i;
	for(i = 0; i < theForm.elements.length; i++)
	{
		if(theForm.elements[i].type == "radio" && theForm.elements[i].name == name &&
			theForm.elements[i].checked == true)
		{
			return true;
		}
	}
	return false;
}

// get radio button value
function GetRadioValue(theForm, name) 
{ 
	var i; 
	for(i = 0; i < theForm.elements.length; i++) 
	{ 
		if(theForm.elements[i].type == "radio" && theForm.elements[i].name == name && 
		theForm.elements[i].checked == true) 
		{ 
			return theForm.elements[i].value; 
		} 
	} 
	return ""; 
}