//====================================================================
//define global
var btot = 2;
var istak = 0;
var ostak = 0;
var oliab = 0;
var oretn = 0;
var oprof = 0;
var otex1 = '';
var otex2 = '';
var iodds = new Array(btot);
var oactn = new Array(btot);
var owipl = new Array(btot);
var olopl = new Array(btot);
//var wiodds0 = 0;
//var wiodds1 = 0;

//====================================================================
function init() {
set();
chg();
}

//====================================================================
function set() {
for (i = 0; i < btot; i++){
document.inp.actn[i].style.background="#FFEECC";
document.inp.wipl[i].style.background="#FFEECC";
document.inp.lopl[i].style.background="#FFEECC";
}
document.inp.stak[1].style.background="#FFEECC";
document.inp.liab.style.background="#FFEECC";
document.inp.retn.style.background="#FFEECC";
document.inp.prof.style.background="#FFEECC";
//document.inp.tex1.style.background="#FFEECC";
//document.inp.tex2.style.background="#FFEECC";
document.inp.odds[0].value = 10;
document.inp.odds[1].value = 8;
document.inp.stak[0].value = 10;
document.inp.odds[0].focus();
}
//====================================================================
function chg() {

//get variable values
istak=fmtNum(document.inp.stak[0].value);
ostak=0;
oliab=0;
oretn=0;
oprof=0;
otex1='';
otex2='';
for (i = 0; i < btot; i++){
iodds[i]=fmtNum(document.inp.odds[i].value);
oactn[i]='';
owipl[i]=0;
olopl[i]=0;
}

// default stake
if (iodds[0]=='' || iodds[0]==0.00) {
iodds[0]=10;
}
if (iodds[1]=='' || iodds[1]==0.00) {
iodds[1]=10;
}
if (istak=='' || istak==0.00) {
istak=10;
}

// calc lines
oretn=iodds[0]*istak;
ostak=oretn/iodds[1];
//alert(iodds[0]+' '+iodds[1]);
//wiodds0=Number(iodds[0]);
//wiodds1=Number(iodds[1]);
iodds[0]=Number(iodds[0]);
iodds[1]=Number(iodds[1]);
istak=Number(istak);
if (iodds[0]>iodds[1]) {
owipl[0]=(iodds[0]*istak)-istak;
owipl[1]=(iodds[1]*ostak)-ostak;
olopl[0]=istak;
olopl[1]=ostak;
oliab=owipl[1]+olopl[0];
oprof=oretn-oliab;
oprof=fmtNum(oprof);
ostak=fmtNum(ostak);
oactn[0]='BACK';
oactn[1]='LAY';
otex1='LAY £'+ostak+' at odds of '+iodds[1]+' for a guaranteed profit of £'+oprof+'.';
otex2='This is assuming you have already BACKED £'+istak+' at odds of '+iodds[0]+'.';
}
else {
owipl[0]=(iodds[0]*istak)-istak;
owipl[1]=(iodds[1]*ostak)-ostak;
olopl[0]=istak;
olopl[1]=ostak;
oliab=owipl[0]+olopl[1];
oprof=oretn-oliab;
oprof=fmtNum(oprof);
ostak=fmtNum(ostak);
oactn[1]='BACK';
oactn[0]='LAY';
otex1='BACK £'+ostak+' at odds of '+iodds[1]+' for a guaranteed profit of £'+oprof+'.';
otex2='This is assuming you have already LAYED £'+istak+' at odds of '+iodds[0]+'.';
}

//set variable values
document.inp.stak[0].value=fmtNum(istak);
document.inp.stak[1].value=fmtNum(ostak);
document.inp.liab.value=fmtNum(oliab);
document.inp.retn.value=fmtNum(oretn);
document.inp.prof.value=fmtNum(oprof);
document.inp.tex1.value=otex1;
document.inp.tex2.value=otex2;
if (owipl[0]>=owipl[1]){
document.inp.wipl[0].value=fmtNum(owipl[0]);
document.inp.wipl[1].value='-' + fmtNum(owipl[1]);
}
else {
document.inp.wipl[0].value='-' + fmtNum(owipl[0]);
document.inp.wipl[1].value=fmtNum(owipl[1]);
}
if (olopl[0]>=olopl[1]){
document.inp.lopl[0].value=fmtNum(olopl[0]);
document.inp.lopl[1].value='-' + fmtNum(olopl[1]);
}
else {
document.inp.lopl[0].value='-' + fmtNum(olopl[0]);
document.inp.lopl[1].value=fmtNum(olopl[1]);
}
for (i = 0; i < btot; i++) {
//if (iodds[i]!='' && iodds[i]!='0.00') {
document.inp.odds[i].value=fmtNum(iodds[i]);
//document.inp.wipl[i].value=fmtNum(owipl[i]);
//document.inp.lopl[i].value=fmtNum(olopl[i]);
document.inp.actn[i].value=oactn[i];
//}
}

}
//====================================================================