数字转换成罗马数字

加入如下代码到head区域
<script> function romanise(){ var persian=numeral.value; var roman=""; var ronumdashes=""; var buffer=10-persian.length; while (buffer>0) {persian="0"+persian;buffer--} var units=new Array("","I","II","III","IV","V","VI","VII","VIII","IX"); var tens=new Array("","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"); var hundreds=new Array("","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"); var thousands=new Array("","M","MM","MMM","MV","V","VM","VMM","VMMM","MX"); var billionsdashes=new Array("","=","==","===","=≡","≡","≡=","≡==","≡===","=≡"); romandashes=billionsdashes[persian.substring(0,1)]; var hundredmillionsdashes=new Array("","=","==","===","==","=","==","===","====","=="); romandashes+=hundredmillionsdashes[persian.substring(1,2)]; var tenmillionsdashes=new Array("","=","==","===","==","=","==","===","====","=="); romandashes+=tenmillionsdashes[persian.substring(2,3)]; var millionsdashes=new Array("","_","__","___","_=","=","=_","=__","=___","_="); romandashes+=millionsdashes[persian.substring(3,4)]; var hundredthousandsdashes=new Array("","_","__","___","__","_","__","___","____","__"); romandashes+=hundredthousandsdashes[persian.substring(4,5)]; var tenthousandsdashes=new Array("","_","__","___","__","_","__","___","____","__"); romandashes+=tenthousandsdashes[persian.substring(5,6)]; var thousandsdashes=new Array("","","",""," _","_","_","_","_"," _"); romandashes+=thousandsdashes[persian.substring(6,7)]; roman=thousands[persian.substring(0,1)]; roman+=hundreds[persian.substring(1,2)]; roman+=tens[persian.substring(2,3)]; roman+=thousands[persian.substring(3,4)]; roman+=hundreds[persian.substring(4,5)]; roman+=tens[persian.substring(5,6)]; roman+=thousands[persian.substring(6,7)]; roman+=hundreds[persian.substring(7,8)]; roman+=tens[persian.substring(8,9)]; roman+=units[persian.substring(9,10)]; result.innerHTML=romandashes+"<br>"+roman; } </script>

加入如下代码到body区域
<input type="text" name=numeral size="10" onKeypress="if (event.keyCode<48 || event.keyCode>57) event.returnValue=false;" maxlength="10"><input type="button" value="Convert" onclick="romanise()"></p> <tt id=result style=font-size:12px>在文本框里输入一个数字转换成罗马数字