Sabtu, 15 Maret 2014
program_mecari_hari
<HTML>
<HEAD>
<TITLE>Belajar Array</TITLE>
<BODY>
<SCRIPT LANGUAGE = "JavaScript">
<!--
var nama_hari = new Array("error","Senin","Selasa","Rabu","Kamis","Jumat","Sabtu","minggu");
function hari()
{
var angka = document.getElementById("text_hari").value;
document.getElementById("text_hasil").value = nama_hari[angka];
}
//-->
</SCRIPT>
</HEAD>
ketik angka = <input type=text id=text_hari> <br>
<input type=button value=Cari onclick='hari();'> <br>
Hasil hari= <input type=text id=text_hasil>
</BODY>
</HTML>
Jumat, 07 Maret 2014
<HTML>
<head>
<title>Menghitung Persamaan Fungsi Kuadrat</title>
</head>
<body>
<script language ="JavaScript">
<!--
function det(a,b,c) {
var d = (b*b) - (4*a*c);
return(d);
}
var a = parseFloat(prompt(" Masukan nilai A : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var b = parseFloat(prompt(" Masukan nilai B : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var c = parseFloat(prompt(" Masukan nilai C : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var deter = det(a,b,c);
document.write("Nilai Determinannya = " +deter+"<br>");
document.write("<br>");
if (deter>0)
{
var x1 = (-b - Math.sqrt(deter))/(2*a);
var x2 = (-b + Math.sqrt(deter))/(2*a);
document.write("Nilai x1 = " +x1+ "<br>");
document.write("Nilai x2 = " +x2+ "<br>");
document.write("<br>");
document.write("Akar-akarnya Berbeda");
} else
if (deter==0)
{
var x1 = (-b - Math.sqrt(deter))/(2*a);
var x2 = (-b + Math.sqrt(deter))/(2*a);
document.write("Nilai x1 = " +x1+ "<br>");
document.write("Nilai x2 = " +x2+ "<br>");
document.write("<br>");
document.write("Akar-akarnya Sama");
} else
if (deter<0)
{
document.write("akarnya imaginer");
}else {
alert("Data yang anda masukan salah,, Harus angka");
}
</script>
</body>
</html>
<head>
<title>Menghitung Persamaan Fungsi Kuadrat</title>
</head>
<body>
<script language ="JavaScript">
<!--
function det(a,b,c) {
var d = (b*b) - (4*a*c);
return(d);
}
var a = parseFloat(prompt(" Masukan nilai A : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var b = parseFloat(prompt(" Masukan nilai B : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var c = parseFloat(prompt(" Masukan nilai C : \nFormat persamaan kuadrat : ax2 + bx + c = 0"));
var deter = det(a,b,c);
document.write("Nilai Determinannya = " +deter+"<br>");
document.write("<br>");
if (deter>0)
{
var x1 = (-b - Math.sqrt(deter))/(2*a);
var x2 = (-b + Math.sqrt(deter))/(2*a);
document.write("Nilai x1 = " +x1+ "<br>");
document.write("Nilai x2 = " +x2+ "<br>");
document.write("<br>");
document.write("Akar-akarnya Berbeda");
} else
if (deter==0)
{
var x1 = (-b - Math.sqrt(deter))/(2*a);
var x2 = (-b + Math.sqrt(deter))/(2*a);
document.write("Nilai x1 = " +x1+ "<br>");
document.write("Nilai x2 = " +x2+ "<br>");
document.write("<br>");
document.write("Akar-akarnya Sama");
} else
if (deter<0)
{
document.write("akarnya imaginer");
}else {
alert("Data yang anda masukan salah,, Harus angka");
}
</script>
</body>
</html>
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