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<![CDATA[
<HTML>
<HEAD>
<TITLE>JavaScript DESTINATION - P158</TITLE>
</HEAD>
<script language="JavaScript">
<!--
function round(val)
{
return(Math.round(val*10000000)/10000000);
}
PI = 3.141592654;
function pie()
{
document.keypad.display.value = PI;
}
function MakeArray(n){
this.length=n;
for(var i=1; i<=n; i++) this[i]=0;
return this
}
link = new MakeArray(5);
function enter(num)
{
document.keypad.display.value += num;
}
function calculate(sign)
{
var temp = document.keypad.display.value * 1;
document.keypad.display.value = "";
document.keypad.list.value = temp;
link[1] = temp;
if (sign == "/") {link[2] = "/"; document.keypad.list.value += " / ";}
if (sign == "*") {link[2] = "*"; document.keypad.list.value += " * ";}
if (sign == "-") {link[2] = "-"; document.keypad.list.value += " - ";}
if (sign == "+") {link[2] = "+"; document.keypad.list.value += " + ";}
if (sign == "p") {link[2] = "p"; document.keypad.list.value += " ^ ";}
}
function power()
{
temp = 1;
n = link[3];
for(var i=1; i<=n; i++) temp *= link[1];
return(temp);
}
function equal()
{
if (link[2]) {
if (document.keypad.display.value != "") {
var temp = document.keypad.display.value * 1;
document.keypad.list.value += temp;
link[3] = temp;
if (link[2] == "/") {res = link[1] / link[3]; document.keypad.display.value = round(res)}
if (link[2] == "*") {res = link[1] * link[3]; document.keypad.display.value = round(res)}
if (link[2] == "-") {res = link[1] - link[3]; document.keypad.display.value = round(res)}
if (link[2] == "+") {res = link[1] + link[3]; document.keypad.display.value = round(res)}
if (link[2] == "p") {document.keypad.display.value = round( power() )}
link[1]=0; link[2]=0; link[3]=0;
}
}
}
function calc(code)
{
var temp = document.keypad.display.value * 1;
if (code == 1) {temp1 = Math.sin(temp*PI/180); document.keypad.list.value = "sin "}
if (code == 2) {temp1 = Math.cos(temp*PI/180); document.keypad.list.value = "cos "}
if (code == 3) {temp1 = Math.tan(temp*PI/180); document.keypad.list.value = "tan "}
if (code == 4) {temp1 = Math.sqrt(temp); document.keypad.list.value = "sqrt "}
if (code == 5) {temp1 = Math.log(temp); document.keypad.list.value = "ln "}
if (code == 6) {temp1 = 1/temp; document.keypad.list.value = "1/x, x="}
if (code == 7) {temp1 = temp * temp; document.keypad.list.value = "x*x, x="}
document.keypad.list.value += temp;
document.keypad.display.value = round(temp1);
}
function fsolve()
{
var a = document.keypad.c1.value*1;
var b = document.keypad.c2.value*1;
var c = document.keypad.c3.value*1;
if (a==0) {document.keypad.list.value = "Nespravna kvadraticka";
document.keypad.display.value = "funkcia !"}
else { x1 = (b*b-4*a*c);
if ( x1 < 0) {document.keypad.list.value = "Imaginarne korene";
temp = (Math.sqrt(Math.abs(x1)))/(2*a);
x2 = round(-b/(2*a)) + "+/- " + round(temp) + "i";
document.keypad.display.value = x2}
else {
var x1 = (-b + Math.sqrt(b*b-4*a*c)) / (2*a);
var x2 = (-b - Math.sqrt(b*b-4*a*c)) / (2*a);
document.keypad.list.value = "x1 = " + round(x1);
document.keypad.display.value = "x2 = " + round(x2);
}
}
}
function change()
{
var temp = document.keypad.display.value;
if (temp.substring(0,1) == "-") {document.keypad.list.value = "";
document.keypad.display.value = 0 - document.keypad.display.value * 1}
if (temp.substring(0,1) != "-") {document.keypad.list.value = "";
document.keypad.display.value = "-" + temp.substring(0,temp.length)}
}
function eraser()
{
document.keypad.list.value = "Zacni pocitat!";
document.keypad.display.value = "";
document.keypad.c1.value = "";
document.keypad.c2.value = "";
document.keypad.c3.value = "";
link[1]=0; link[2]=0; link[3]=0;
}
function backer()
{
var temp = document.keypad.display.value;
document.keypad.display.value = temp.substring(0,temp.length*1 -1);
}
var memory = 0;
function mem(val)
{
if (val == 1 ) {document.keypad.list.value = " --> Do pamate";
memory = document.keypad.display.value * 1}
if (val == -1) {document.keypad.display.value = memory}
if (val == 0 ) {document.keypad.list.value = " Pamat zmazana";
document.keypad.display.value = ""; memory = 0}
}
function message()
{
alert('\n\nSvoje navrhy a zlepsenia posielajte na adresu: \n\n ----> webmaster@javascript.sk <----');
}
function travel(link)
{
window.open(link,"calculator","toolbar=1,location=1,status=1,scrollbars=1,directories=1,copyhistory=1,menubar=1,resizable=1")
}
var screen=" ";
function eraser2()
{
var ans = confirm('\nChcete naozaj zmazat pomocnu plochu ?\n');
if (ans) {screen = document.notes.junk.value; document.notes.junk.value = "";}
}
function copy()
{
document.notes.junk.value = document.keypad.list.value+"\n"+document.keypad.display.value+"\n"+document.notes.junk.value;
}
function help()
{
screen = document.notes.junk.value;
msg1 = "Niekolko zakladnych funkcii:\n";
msg2 = "\n(<-> M) - Zmaz obsah pamate\n(--> M) - Vloz do pamate\n(<-- M) - Vyber z pamate";
msg3 = "\n(<--) - Zmaz posledny znak\n(x^y) - X na Y";
msg4 = "\n\nPre Navrat</a> / <a href="priklady-english.html">BACK, klikni na 'Obnov CALCpad'";
document.notes.junk.value = "";
document.notes.junk.value = msg1 + msg2 + msg3 + msg4;
}
function restore()
{
document.notes.junk.value = "";
document.notes.junk.value = screen;
}
// -->
</script>
<BODY BGCOLOR="#FFFFFF">
<CENTER><table border=0 width="100%"><tr><td valign=middle align=center rowspan=2>
<form name="keypad"><CENTER><table border=6 cellspacing=2 cellpadding=3>
<tr><td valign=middle align=center colspan=9>
<FONT SIZE="6">
Dokonala kalkulacka
</FONT>
</td></tr>
<tr><td valign=middle align=center colspan=6><input type="text" name="list" size=22 value="Zacni pocitat!">
</td><td valign=middle align=center colspan=3>
<input type="button" name="alex" value=" VYMAZ " onClick="eraser()"></td></tr>
<tr><td valign=middle align=center colspan=6><input type="text" name="display" size=22 value=""></td>
<td valign=middle align=center colspan=2>
<input type="button" name="alex" value=" = " onClick="equal()"></td>
<td valign=middle align=center><input type="button" name="alex" value=" <-- " onClick="backer()"></td></tr>
<tr><td valign=middle align=center><input type="button" name="alex" value=" 1 " onClick="enter(1)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 2 " onClick="enter(2)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 3 " onClick="enter(3)"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" / " onClick="calculate('/')"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" sin " onClick="calc(1)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" x½ " onClick="calc(4)"></td>
<td valign=middle align=center><input type="button" name="alex" value="<->M" onClick="mem(0)"></td></tr>
<tr><td valign=middle align=center><input type="button" name="alex" value=" 4 " onClick="enter(4)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 5 " onClick="enter(5)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 6 " onClick="enter(6)"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" * " onClick="calculate('*')"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value="cos" onClick="calc(2)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" x² " onClick="calc(7)"></td>
<td valign=middle align=center><input type="button" name="alex" value="--> M" onClick="mem(1)"></td></tr>
<tr><td valign=middle align=center><input type="button" name="alex" value=" 7 " onClick="enter(7)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 8 " onClick="enter(8)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" 9 " onClick="enter(9)"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" - " onClick="calculate('-')"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value="tan " onClick="calc(3)"></td>
<td valign=middle align=center><input type="button" name="alex" value="1/x " onClick="calc(6)"></td>
<td valign=middle align=center><input type="button" name="alex" value="<-- M" onClick="mem(-1)"></td></tr>
<tr><td valign=middle align=center><input type="button" name="alex" value=" 0 " onClick="enter(0)"></td>
<td valign=middle align=center><input type="button" name="alex" value="bodka" onClick="enter('.')"></td>
<td valign=middle align=center><input type="button" name="alex" value=" +|- " onClick="change()"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" + " onClick="calculate('+')"></td>
<td></td>
<td valign=middle align=center><input type="button" name="alex" value=" pi " onClick="pie()"></td>
<td valign=middle align=center><input type="button" name="alex" value=" Ln " onClick="calc(5)"></td>
<td valign=middle align=center><input type="button" name="alex" value=" x^y " onClick="calculate('p')"></td></tr>
<tr><tr><td valign=middle align=center colspan=9></td></tr><tr><td valign=middle align=center colspan=9>
<B><input type="text" name="c1" size=4 value=""> *X² +
<input type="text" name="c2" size=4 value=""> *X +
<input type="text" name="c3" size=4 value=""> = 0
<input type="button" name="alex" value="Vyries" onClick="fsolve()"></B>
</td></tr>
</table></CENTER></form>
</td><td valign=middle align=center>
<FONT SIZE=6 COLOR="#800040"><I><B>CALCpad</B></I></FONT></td></tr>
<tr><td valign=middle align=center>
<form name="notes"><TEXTAREA NAME="junk" ROWS=10 COLS=40 WRAP=virtual></TEXTAREA><BR><BR>
<CENTER><input type="button" name="alex" value="Vlozenie vysledku do tabulky" onClick="copy()"><BR><BR>
<input type="button" name="alex" value="Vymaz CALCpad" onClick="eraser2()">
<input type="button" name="alex" value="Obnov CALCpad" onClick="restore()"></CENTER>
</td></tr><tr><td valign=middle align=center colspan=2><HR><BR>
<CENTER><input type="button" name="alex" value=" Pomoc " onClick="help()">
<input type="button" name="alex" value="Potrebujete pomoc ?" onClick="message()"></CENTER>
</td></tr></form></table></CENTER>
</BODY>
</HTML>
]]>
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