function submitchk(f)
{

	if (!integer_between(f.fxs_callerid_power_level.value, 0, 20, "Caller ID Power Level should be an integer between 0..20.")) {
		return false;
	}

	if (!integer_between(f.fxs_port0_hook_flash_detect_ubound.value, 100, 2000, "Port 1 Hook Flash Detect Upper Bound should be an integer between 100..2000.") ||
		!integer_between(f.fxs_port0_hook_flash_detect_lbound.value, 100, 2000, "Port 1 Hook Flash Detect Lower Bound should be an integer between 100..2000.") )
		return false;

	if (fxs_num=="2"){
		if (!integer_between(f.fxs_port1_hook_flash_detect_ubound.value, 100, 2000, "Port 2 Hook Flash Detect Upper Bound should be an integer between 100..2000.") ||
			!integer_between(f.fxs_port1_hook_flash_detect_lbound.value, 100, 2000, "Port 2 Hook Flash Detect Lower Bound should be an integer between 100..2000.") )
			return false;
	}
	return true;
}