can some one tell me how to reverse the function of this convertor so that when you enter roman numerals the equivalent arabic will be produced.
heres the code
I would really appreciate any help
<HTML>
<HEAD>
<TITLE>Roman Numeral Convertor</TITLE>
<SCRIPT LANGUAGE="JavaScript">
var ones_numerals = new Array();
ones_numerals[0] = "";
ones_numerals[1] = "I";
ones_numerals[2] = "II";
ones_numerals[3] = "III";
ones_numerals[4] = "IV";
ones_numerals[5] = "V";
ones_numerals[6] = "VI";
ones_numerals[7] = "VII";
ones_numerals[8] = "VIII";
ones_numerals[9] = "IX";
var tens_numerals = new Array();
tens_numerals[0] = "";
tens_numerals[1] = "X";
tens_numerals[2] = "XX";
tens_numerals[3] = "XXX";
tens_numerals[4] = "XL";
tens_numerals[5] = "L";
tens_numerals[6] = "LX";
tens_numerals[7] = "LXX";
tens_numerals[8] = "LXXX";
tens_numerals[9] = "XC";
var hundreds_numerals = new Array();
hundreds_numerals[0] = "";
hundreds_numerals[1] = "C";
hundreds_numerals[2] = "CC";
hundreds_numerals[3] = "CCC";
hundreds_numerals[4] = "CD";
hundreds_numerals[5] = "D";
hundreds_numerals[6] = "DC";
hundreds_numerals[7] = "DCC";
hundreds_numerals[8] = "DCCC";
hundreds_numerals[9] = "CM";
var thousands_numerals = new Array();
thousands_numerals[0] = "";
thousands_numerals[1] = "M";
thousands_numerals[2] = "MM";
thousands_numerals[3] = "MMM";
function checkNumber(number)
{
if((parseInt(number) < 4000) && (parseInt(number) > 0))
{
var numeral = createNumeral(number);
if(numeral.indexOf('undefined') == -1)
{
window.document.form.numeral.value = numeral;
}
}else{
alert('Please enter a valid number!!');
}
}
function createNumeral(num)
{
var new_num = num
var thousands = Math.floor(new_num / 1000);
new_num -= thousands * 1000;
var hundreds = Math.floor(new_num / 100);
new_num -= hundreds * 100;
var tens = Math.floor(new_num / 10);
new_num -= tens * 10;
var ones = Math.floor(new_num / 1);
if((thousands == NaN)||(hundreds == NaN)||(tens == NaN)||(ones == NaN))
{
alert('Please enter a valid number!!');
}else{
var array = new Array(thousands,hundreds,tens,ones);
return makeNumeral(array);
}
}
function makeNumeral(place_values)
{
var numeral = "";
numeral += thousands_numerals[place_values[0]];
numeral += hundreds_numerals[place_values[1]];
numeral += tens_numerals[place_values[2]];
numeral += ones_numerals[place_values[3]];
return numeral;
}
</script>
</HEAD>
<BODY>
<div align="center">
<form name="form">
<b>Enter a number between (1-3999) :</b> <input size="5" name="number" ><p>
<input type="button" value=http://www.webdeveloper.com/forum/archive/index.php/"Convert" onclick ="checkNumber(window.document.form.number.value)">
<P><STRONG>Answer : </STRONG> <input name="numeral" ></P>
<P><br>
<table width="20%" align="center" border="1" cellspacing="1" cellpadding="2" >
<tr>
<td>M = 1000</td>
<td>D = 500</td>
<td>C = 100</td>
<td>L = 50</td>
</tr>
<tr>
<td>X = 10</td>
<td>V = 5</td>
<td>I = 1</td>
<td> </td>
</tr>
</table></P>
</form>
</div>
<p>
<P> </P>
</BODY>
</HTML>
heres the code
I would really appreciate any help
<HTML>
<HEAD>
<TITLE>Roman Numeral Convertor</TITLE>
<SCRIPT LANGUAGE="JavaScript">
var ones_numerals = new Array();
ones_numerals[0] = "";
ones_numerals[1] = "I";
ones_numerals[2] = "II";
ones_numerals[3] = "III";
ones_numerals[4] = "IV";
ones_numerals[5] = "V";
ones_numerals[6] = "VI";
ones_numerals[7] = "VII";
ones_numerals[8] = "VIII";
ones_numerals[9] = "IX";
var tens_numerals = new Array();
tens_numerals[0] = "";
tens_numerals[1] = "X";
tens_numerals[2] = "XX";
tens_numerals[3] = "XXX";
tens_numerals[4] = "XL";
tens_numerals[5] = "L";
tens_numerals[6] = "LX";
tens_numerals[7] = "LXX";
tens_numerals[8] = "LXXX";
tens_numerals[9] = "XC";
var hundreds_numerals = new Array();
hundreds_numerals[0] = "";
hundreds_numerals[1] = "C";
hundreds_numerals[2] = "CC";
hundreds_numerals[3] = "CCC";
hundreds_numerals[4] = "CD";
hundreds_numerals[5] = "D";
hundreds_numerals[6] = "DC";
hundreds_numerals[7] = "DCC";
hundreds_numerals[8] = "DCCC";
hundreds_numerals[9] = "CM";
var thousands_numerals = new Array();
thousands_numerals[0] = "";
thousands_numerals[1] = "M";
thousands_numerals[2] = "MM";
thousands_numerals[3] = "MMM";
function checkNumber(number)
{
if((parseInt(number) < 4000) && (parseInt(number) > 0))
{
var numeral = createNumeral(number);
if(numeral.indexOf('undefined') == -1)
{
window.document.form.numeral.value = numeral;
}
}else{
alert('Please enter a valid number!!');
}
}
function createNumeral(num)
{
var new_num = num
var thousands = Math.floor(new_num / 1000);
new_num -= thousands * 1000;
var hundreds = Math.floor(new_num / 100);
new_num -= hundreds * 100;
var tens = Math.floor(new_num / 10);
new_num -= tens * 10;
var ones = Math.floor(new_num / 1);
if((thousands == NaN)||(hundreds == NaN)||(tens == NaN)||(ones == NaN))
{
alert('Please enter a valid number!!');
}else{
var array = new Array(thousands,hundreds,tens,ones);
return makeNumeral(array);
}
}
function makeNumeral(place_values)
{
var numeral = "";
numeral += thousands_numerals[place_values[0]];
numeral += hundreds_numerals[place_values[1]];
numeral += tens_numerals[place_values[2]];
numeral += ones_numerals[place_values[3]];
return numeral;
}
</script>
</HEAD>
<BODY>
<div align="center">
<form name="form">
<b>Enter a number between (1-3999) :</b> <input size="5" name="number" ><p>
<input type="button" value=http://www.webdeveloper.com/forum/archive/index.php/"Convert" onclick ="checkNumber(window.document.form.number.value)">
<P><STRONG>Answer : </STRONG> <input name="numeral" ></P>
<P><br>
<table width="20%" align="center" border="1" cellspacing="1" cellpadding="2" >
<tr>
<td>M = 1000</td>
<td>D = 500</td>
<td>C = 100</td>
<td>L = 50</td>
</tr>
<tr>
<td>X = 10</td>
<td>V = 5</td>
<td>I = 1</td>
<td> </td>
</tr>
</table></P>
</form>
</div>
<p>
<P> </P>
</BODY>
</HTML>