
<!--

function Window_Popup( iStrUrl , iStrWindowName , iIntToolbar , iIntLocation , iIntStatus , iIntMenubar , iIntScrollbars , iIntResizable , iIntWidth , iIntHeight ) {

	// --- iStrUrl [Str]
	// --- iStrWindowName [Str]
	// --- iIntToolbar to iIntResizable [Int] ( 0 --> No , 1 --> Yes )
	// --- iIntWidth , iIntHeight [Int]

	var vStrWindow_Popup = window.open( iStrUrl , iStrWindowName , 'toolbar=' + iIntToolbar + ' , location=' + iIntLocation + ' , directories=0 , status=' + iIntStatus + ' , menubar=' + iIntMenubar + ' , scrollbars=' + iIntScrollbars + ' , resizable=' + iIntResizable + ' , width=' + iIntWidth + ', height=' + iIntHeight );
	vStrWindow_Popup.focus();

}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}


r = new Array(2)
function setStartState(){
state="start"
r[0] = "0"
r[1] = "0"
operand=""
ix=0
}
function addDigit(n){
if(state=="gettingInteger" || state=="gettingFloat")
r[ix]=appendDigit(r[ix],n)
else{
r[ix]=""+n
state="gettingInteger"
}
display(r[ix])
}
function appendDigit(n1,n2){
if(n1=="0") return ""+n2
var s=""
s+=n1
s+=n2
return s
}
function display(s){
document.calculator.total.value=s
}
function addDecimalPoint(){
if(state!="gettingFloat"){ 
decimal=true
r[ix]+="."
if(state=="haveOperand" || state=="getOperand2") r[ix]="0."
state="gettingFloat"
display(r[ix])
}
}
function clearDisplay(){
setStartState()
display(r[0])
}
function changeSign(){
if(r[ix].charAt(0)=="-") r[ix]=r[ix].substring(1,r[ix].length)
else if(parseFloat(r[ix])!=0) r[ix]="-"+r[ix]
display(r[ix])
}
function calc(){
if(state=="gettingInteger" || state=="gettingFloat" ||
state=="haveOperand"){
if(ix==1){
r[0]=calculateOperation(operand,r[0],r[1])
ix=0
}
}else if(state=="getOperand2"){
r[0]=calculateOperation(operand,r[0],r[0])
ix=0
}
state="haveOperand"
decimal=false
display(r[ix])
}
function calculateOperation(op,x,y){
var result=""
if(op=="+"){
result=""+(parseFloat(x)+parseFloat(y))
}else if(op=="-"){
result=""+(parseFloat(x)-parseFloat(y))
}else if(op=="*"){
result=""+(parseFloat(x)*parseFloat(y))
}else if(op=="/"){
if(parseFloat(y)==0){
alert("Division by 0 not allowed.")
result=0
}else result=""+(parseFloat(x)/parseFloat(y))
}
return result
}
function performOp(op){
if(state=="start"){
++ix
operand=op
}else if(state=="gettingInteger" || state=="gettingFloat" ||
state=="haveOperand"){
if(ix==0){
++ix
operand=op
}else{
r[0]=calculateOperation(operand,r[0],r[1])
display(r[0])
operator=op
}
}
state="getOperand2"
decimal=false
}
// -->