function emailCheck() {
	if (document.frm_optin_popup.s_first_name.value=="") {
		alert("Please enter your first name.");
		document.frm_optin_popup.s_first_name.focus();
		return false;
	}
	
	if (document.frm_optin_popup.s_email.value=="") {
		alert("Please enter your email address.");
		document.frm_optin_popup.s_email.focus();
		return false;
	}
	
	if(document.frm_optin_popup.s_email.value.indexOf('@', 0) == -1){
		alert("Please enter a valid email address.");
		document.frm_optin_popup.s_email.focus();
		return false;
	}
	
	if(document.frm_optin_popup.s_email.value.indexOf('.', 0) == -1){
		alert("Please enter a valid email address.");
		document.frm_optin_popup.s_email.focus();
		return false;
	}
}
 
function emailCheck_noname() {
	if (document.frm_optin.s_email.value=="") {
		alert("Please enter your email address.");
		document.frm_optin.s_email.focus();
		return false;
	}
	
	if(document.frm_optin.s_email.value.indexOf('@', 0) == -1){
		alert("Please enter a valid email address.");
		document.frm_optin.s_email.focus();
		return false;
	}
	
	if(document.frm_optin.s_email.value.indexOf('.', 0) == -1){
		alert("Please enter a valid email address.");
		document.frm_optin.s_email.focus();
		return false;
	}
}