function clearSignupField() {
	if(document.getElementById('tFormNSSignupText').value == "Enter email address..."){
		document.getElementById('tFormNSSignupText').value = "";
	}
}

function checkSignupForm() {	
	var emailaddr = document.getElementById('tFormNSSignupText').value;
	
	if (emailaddr == "") {
		alert("Please enter a valid Email Address.\nYou entered: \"" + emailaddr + "\"");
		return false;
	
	}else {
		
		var vEmail = emailaddr;
		var AtPos = vEmail.indexOf("@");
		var StopPos = vEmail.lastIndexOf(".");
		
		if (AtPos == -1 || StopPos == -1) {
			alert("Please enter a valid Email Address.\nYou entered: \"" + vEmail + "\"");
			return false;
		}	
	}
}