////////////////////////////////////////////////////////////////////////
// Common JavaScript Functions
// 
//
//
////////////////////////////////////////////////////////////////////////

//Form validation functions
function show_alert() {
	alert("Unable to submit your form. Please check for missing or incorrect information.");
}

function is_null(field_value) {
	if (field_value == "") {
		return true;
	} else {
		return false;
	}
}

function replace_special(field_value) {
	//Add underscore between potentially dangerous character sequences
	field_value = field_value.replace(/[\x00-\x1F]/g, "_");
	field_value = field_value.replace(/\\/g, "\\_");
	field_value = field_value.replace(/&#/g, "&_# ");
	field_value = field_value.replace(/</g, "<_");
	field_value = field_value.replace(/\.bat/ig, "._bat");
	field_value = field_value.replace(/\.com/ig, "._com");
	field_value = field_value.replace(/\.exe/ig, "._exe");
	field_value = field_value.replace(/\.vbs/ig, "._vbs");
	return field_value;
}