function formValidation(form) {
	if (form.os0.value.length<5 ||
	    form.os0.value.length>8) {
			alert("Sorry, your STC membership number is not valid. Please verify the number.");
			form.os0.focus();
			return false;
		}

	if(notEmpty(form.os0)) {
							return true;
	}
	return false;

}

function notEmpty(elem){
	var str = elem.value;
	if(str.length == 0 ||
	form.os0.value("Enter STC Membership Number")==1 ) {
		alert("Please enter your STC membership number.");
		return false;
	} else {
		return true;
	}
}