function do_init() {
  document.register.str.readOnly = "true";
  document.register.dex.readOnly = "true";
  document.register.con.readOnly = "true";
  document.register.per.readOnly = "true";
  document.register.remain.readOnly = "true";
}

function str(num) {
	if (num > 0) {
		 if ((document.register.remain.value > 0) && (document.register.str.value < max_val_str)) {
		 		document.register.str.value++;
				document.register.remain.value--; }}
	else if (num < 0) {
		 if (document.register.str.value > min_str) {
		 		document.register.str.value--;
				document.register.remain.value++; }}
}

function dex(num) {
	if (num > 0) {
		 if ((document.register.remain.value > 0) && (document.register.dex.value < max_val_dex)) {
		 		document.register.dex.value++;
				document.register.remain.value--; }}
	else if (num < 0) {
		 if (document.register.dex.value > min_dex) {
		 		document.register.dex.value--;
				document.register.remain.value++; }}
}

function con(num) {
	if (num > 0) {
		 if ((document.register.remain.value > 0) && (document.register.con.value < max_val_con)) {
		 		document.register.con.value++;
				document.register.remain.value--; }}
	else if (num < 0) {
		 if (document.register.con.value > min_con) {
		 		document.register.con.value--;
				document.register.remain.value++; }}
}

function per(num) {
	if (num > 0) {
		 if ((document.register.remain.value > 0) && (document.register.per.value < max_val_per)) {
		 		document.register.per.value++;
				document.register.remain.value--; }}
	else if (num < 0) {
		 if (document.register.per.value > min_per) {
		 		document.register.per.value--;
				document.register.remain.value++; }}
}