var up,down;

var min1,sec1;

var cmin1,csec1,cmin2,csec2;

function Minutes(data) {

	for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;

	return(data.substring(0,i)); }

function Seconds(data) {

	for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;

	return(data.substring(i+1,data.length)); }

function Display(min,sec) {

	var disp;

	if(min<=9) disp=" 0";

	else disp=" ";

	disp+=min+":";

	if(sec<=9) disp+="0"+sec;

	else disp+=sec;

	return(disp); }

function Up() {

	cmin1=0;

	csec1=0;

	min1=0+Minutes(document.sw.beg1.value);

	sec1=0+Seconds(document.sw.beg1.value);

	UpRepeat(); }

function UpRepeat() {

	csec1++;

	if(csec1==60) { csec1=0; cmin1++; }

	document.sw.disp1.value=Display(cmin1,csec1);

	if((cmin1==min1)&&(csec1==sec1)) alert("Stopwatch Stopped");

	else up=setTimeout("UpRepeat()",1000); }

function Down() {

	cmin2=1*Minutes(document.sw.beg2.value);

	csec2=1*Seconds(document.sw.beg2.value);

	DownRepeat(); }

function DownRepeat() {

	csec2--;

	if(csec2==-1) { csec2=59; cmin2--; }

	document.sw.beg2.value=Display(cmin2,csec2);

	if(!(cmin2==0 && csec2==0)) down=setTimeout("DownRepeat()",1000);
 }