I managed to write one. I found a few tutorials on Jquery and they worked fine as a snippet in Modx
Hows this for a first effort -
http://tinyurl.com/2c9l5u9
Thanks,
Smitch
<script type='text/javascript' src='http://jqueryjs.googlecode.com/files/jquery-1.2.6.min.js'></script>
<form id="form5">
<p>
<label style="width:100px;">Your Income:</label>
<input type="text" name="mcIncome" id="mcIncome" class="dollar" />
<button id="calc" onclick="return false">Calculate Income Tax</button>
</p>
<hr style="width:95%; height:1px; color:#999999;">
<div id="answer" style="display:none">
<p align=center>
Your Income Tax:<br/>
<input type="text" name="mcPayment" id="mcPayment" class="dollar" />
</p>
<hr style="width:95%; height:1px; color:#999999;">
<p style="margin-left:50px;"><strong>2009 / 2010 Financial year tax rates.</strong></p>
<table border="1" class="taxcalc" cellpadding=5>
<tbody>
<tr>
<td valign="top" width="160"><p><em>Taxable income</em></p></td>
<td valign="top" width="300"><p><em>Tax on this income</em></p></td>
</tr>
<tr id="1">
<td valign="top" width="160"><p>$1 – $6,000</p></td>
<td valign="top" width="300"><p>Nil</p></td>
</tr>
<tr id="2">
<td valign="top" width="160"><p>$6,001 – $35,000</p></td>
<td valign="top" width="300"><p>15c for each $1 over $6,000</p></td>
</tr>
<tr id="3">
<td valign="top" width="160"><p>$35,001 – $80,000</p></td>
<td valign="top" width="300"><p>$4,350 plus 30c for each $1 over $35,000</p></td>
</tr>
<tr id="4">
<td valign="top" width="160"><p>$80,001 – $180,000</p></td>
<td valign="top" width="300"><p>$17,850 plus 38c for each $1 over $80,000</p></td>
</tr>
<tr id="5">
<td valign="top" width="160"><p>$180,001 and over</p></td>
<td valign="top" width="300"><p>$55,850 plus 45c for each $1 over $180,000</p></td>
</tr>
</tbody>
</table>
<p style="margin-left:50px; font-size:10px; color:#666666;">
Source: <a href="http://www.ato.gov.au/individuals/content.asp?doc=/content/12333.htm" target="_blank" style="font-size:10px; color:#999999;">Australia Tax Office website</a>
</p>
</div>
</form>
<script type="text/javascript">
function CurrencyFormatted(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}
$("#calc").click(function(){
var I, T;
//close answer DIV
$("#answer").slideUp('slow');
//reset the tax table background
$("#1").removeClass("bracket");
$("#2").removeClass("bracket");
$("#3").removeClass("bracket");
$("#4").removeClass("bracket");
$("#5").removeClass("bracket");
//get the income from form
I = parseInt($("#mcIncome").val());
//$1 – $6,000 Nil
//$6,001 – $35,000 15c for each $1 over $6,000
//$35,001 – $80,000 $4,350 plus 30c for each $1 over $35,000
//$80,001 – $180,000 $17,850 plus 38c for each $1 over $80,000
//$180,001 and over $55,850 plus 45c for each $1 over $180,000
//calculate tax on income
if (I <6001) { T = 0; $("#1").addClass("bracket");}
if (I < 35001 && I > 6000) { T = ((I-3500)*0.3); $("#2").addClass("bracket");}
if (I < 80001 && I > 35000) { T = 4350 + ((I-3500)*0.3); $("#3").addClass("bracket");}
if (I < 180001 && I > 80000) { T = 17850 + ((I-80000)*0.38); $("#4").addClass("bracket");}
if (I > 180000) { T = 55850 + ((I-180000)*0.45); $("#5").addClass("bracket");}
//write calculation to form
if(!isNaN(T))
{
var result = CurrencyFormatted(T);
$("#mcPayment").val(result);
}
else
{
$("#mcPayment").val('Please enter a number');
}
//open answer DIV
$("#answer").slideToggle('40000');
return false;
});
</script>
