function isValidUser(){
	var retVal;
	
	jQuery.ajax({
		url : '/index.php/customer/account/create/',
		data : 'intent=checkIfUserExists&email=' + jQuery('#email_address').val(),
		success : function(result){
			retVal = jQuery.trim(jQuery(result).find('.page').text());
		},
		type : 'POST',
		async : false
	});
	
	if (retVal == 'true'){
		jQuery('fieldset.group-select:eq(1)').append('<div class="customer-creation-error">A user with this email already exists.</div>')
		//jQuery('#TB_ajaxContent').css({overflow : 'hidden'});
	}
	
	return retVal === 'true' ? false : true;
}