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Base Converter
[View Sample]
A base converter. Just type a valid positive number in any one of the boxes and click outside the box. The equivalent will appear in the other boxes.
Insert into <HEAD>
Insert into <BODY>
<script language="JavaScript"> <!-- for wise eyes only var hex; function MakeArray() { this.length = 16; return this; } function Populate() { hex = new MakeArray(); hex[1] = "0"; hex[2] = "1"; hex[3] = "2"; hex[4] = "3"; hex[5] = "4"; hex[6] = "5"; hex[7] = "6"; hex[8] = "7"; hex[9] = "8"; hex[10] = "9"; hex[11] = "A"; hex[12] = "B"; hex[13] = "C"; hex[14] = "D"; hex[15] = "E"; hex[16] = "F"; } // function DecimaltoAnother(N, radix) // // return representation of a number N // in the system based on radix // function DecimaltoAnother(N, radix) { s = ""; A = N; while (A >= radix) { B = A % radix; A = Math.floor(A / radix); s += hex[B+1]; } s += hex[A+1]; return Transpose(s); } // function Transpose(s) // // return a string written from right to left // function Transpose(s) { N = s.length; t = ""; for (i = 0; i < N; i++) t = t + s.substring(N-i-1, N-i); s = t; return s; } function EvalB(form) { if (form.b.value.length != 0) M = parseInt(form.b.value, 2); else M = 0; form.t.value = DecimaltoAnother(M, 3); form.q.value = DecimaltoAnother(M, 5); form.o.value = DecimaltoAnother(M, 8); form.h.value = DecimaltoAnother(M, 16); form.d.value = M; } function EvalT(form) { if (form.t.value.length != 0) M = parseInt(form.t.value, 3); else M = 0; form.b.value = DecimaltoAnother(M, 2); form.q.value = DecimaltoAnother(M, 5); form.o.value = DecimaltoAnother(M, 8); form.h.value = DecimaltoAnother(M, 16); form.d.value = M; } function EvalQ(form) { if (form.q.value.length != 0) M = parseInt(form.q.value, 5); else M = 0; form.b.value = DecimaltoAnother(M, 2); form.t.value = DecimaltoAnother(M, 3); form.o.value = DecimaltoAnother(M, 8); form.h.value = DecimaltoAnother(M, 16); form.d.value = M; } function EvalO(form) { if (form.o.value.length != 0) M = parseInt(form.o.value, 8); else M = 0; form.b.value = DecimaltoAnother(M, 2); form.t.value = DecimaltoAnother(M, 3); form.q.value = DecimaltoAnother(M, 5); form.h.value = DecimaltoAnother(M, 16); form.d.value = M; } function EvalH(form) { if (form.h.value.length != 0) M = parseInt(form.h.value, 16); else M = 0; form.b.value = DecimaltoAnother(M, 2); form.t.value = DecimaltoAnother(M, 3); form.q.value = DecimaltoAnother(M, 5); form.o.value = DecimaltoAnother(M, 8); form.d.value = M; } function EvalD(form) { if (form.d.value.length != 0) M = parseInt(form.d.value, 10); else M = 0; form.b.value = DecimaltoAnother(M, 2); form.t.value = DecimaltoAnother(M, 3); form.q.value = DecimaltoAnother(M, 5); form.o.value = DecimaltoAnother(M, 8); form.h.value = DecimaltoAnother(M, 16); } //-- done hiding from old browsers --> </script> </head> <body onLoad="Populate()"> <center><h1>A Base Converter</h1></center> <p>Type a valid positive number in any one of the boxes and click outside the box. The equivalent will appear in the other boxes.</p> <form method="post"> <table border="0" cellspacing="3" cellpadding="3" align="CENTER"> <tr> <td align=right> <p>Binary (Base 2):</p> </td> <td> <input name="b" value="0" onChange="EvalB(form)" size=27> </td> </tr> <tr> <td align=right>Ternary (Base 3):</td> <td> <input name="t" value="0" onChange="EvalT(form)" size=21> </td> </tr> <tr><td align=right>Quintal (Base 5):</td> <td> <input name="q" value="0" onChange="EvalQ(form)" size=16> </td> </tr> <tr> <td align=right>Octal (Base 8):</td> <td> <input name="o" value="0" onChange="EvalO(form)" size=12> </td> </tr> <tr> <td align=right>Decimal (Base 10):</td> <td> <input name="d" value="0" onChange="EvalD(form)" size=11> </td> </tr> <tr> <td align=right>Hexadecimal (Base 16):</td> <td> <input name="h" value="0" onChange="EvalH(form)" size=8> </td> </tr> </table> </form>
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