Using form to create calculator

[Leodore]

Hi Ally,
I was wondering how to go about this problem. I have a number and it can be altered either by a number entered into a text field or it can be altered by selecting a different number from a drop down list.

I have managed to get the form to work so far using jquery that each time the text input is altered the number changes, however if I then change the drop down list I can’t get the number to alter further

'<input type="hidden" name="m_d_s" id = "mds" value="1000000" />
<script>
Number.prototype.formatMoney = function(c, d, t){
var n = this, 
    c = isNaN(c = Math.abs(c)) ? 2 : c, 
    d = d == undefined ? "." : d, 
    t = t == undefined ? "," : t, 
    s = n < 0 ? "-" : "", 
    i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", 
    j = (j = i.length) > 3 ? j % 3 : 0;
   return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
 };
jQuery(document).ready(function ($) {
$(".iphorm_24_4").on('keyup',function(){
var emdts = $('.iphorm_24_18').change('option:selected').val();	
var thismuch= $("#mds").val() / emdts  /$(this).val()
        $(".this_much").html('$' + thismuch.formatMoney(2, '.', ','));
})
});
</script>'

in this code I need it so that if drop down iphorm 25_18 changes then emdts is automatically updated. Any help would be greatly appreciated

• This topic was modified 8 years, 7 months ago by Leodore.

[Ally]

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• This reply was modified 8 years, 7 months ago by Ally.

[Leodore]

Thank you so much Ally!
That works perfectly.

Kind regards

Leo

[Author]

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