function check_search() {
	srch = document.getElementsByName("q")[document.getElementsByName("q").length - 1].value;
	
	srch = srch.replace(/^\s+|\s+$/g,"");
	
	if (srch) {
		return true;
	}
	
	// add error message
	document.getElementById("err_msg").innerHTML = 'Please enter search criteria';
	
	return false;
}

function check_sub_search() {
	srch = document.getElementsByName("q")[0].value;
	
	srch = srch.replace(/^\s+|\s+$/g,"");
	
	if (srch) {
		return true;
	}
	
	// add error message
	document.getElementById("err_msg_sub").innerHTML = 'Please enter search criteria';
	
	return false;
}