JavaScript: Dynamic Field Names

function replaceCommaInCurrency(myField, val)
	{
		var re = /,/g;

		document.net1003Form.myField.value=val.replace(re, '');
	}

eval("document.net1003Form." + myField + ".value=val.replace(re, '');");

document.net1003Form[myField].value=val.replace(re, '');

function replaceCommaInCurrency(field){
    var re = /,/g;
    field.value = field.value.replace(re, '');
}

onBlur="replaceCommaInCurrency(this); return false";

$(function(){
    $("input.currency").bind('blur', function(){
    	this.value = $(this).val().replace(',', '');
    })
});

myField.value = myField.value.replace(re, '');

var jqField = $(myField);
jqField.val(jqField.val().replace(re, ''));

function replaceCommaInCurrency( myField, val)
{
  var re = /,/g;

  document.net1003Form[myField].value=val.replace(re, '');
}

function removeCommaInCurrency(myField)
    {
            var re = /,/g;

            myField.value=myField.value.replace(re, '');
    }

<input type="text" name="..." onchange="removeCommaInCurrency(this);">

<input type="text" class="number" name="something" />
...
<script type="text/javascript"> // external script is best, linked after all forms
    function numberfield_bind() {
        var inputs= document.getElementsByTagName('input');
        for (var inputi= inputs.length; inputi-->0;)
            if (inputs[inputi].className=='number')
                inputs[inputi].onchange= numberfield_change;
    }
    function numberfield_change() {
        this.value= this.value.split(',').join('');
    }
    numberfield_bind();
</script>