get element id and update

autocomplete.js

(function(a){var b=null;a.fn.railsAutocomplete=function(){return this.live("focus",function(){this.railsAutoCompleter||(this.railsAutoCompleter=new a.railsAutocomplete(this))})},a.railsAutocomplete=function(a){_e=a,this.init(_e)},a.railsAutocomplete.fn=a.railsAutocomplete.prototype={railsAutocomplete:"0.0.1"},a.railsAutocomplete.fn.extend=a.railsAutocomplete.extend=a.extend,a.railsAutocomplete.fn.extend({init:function(b){function c(a){return a.split(b.delimiter)}function d(a){return c(a).pop().replace(/^\s+/,"")}b.delimiter=a(b).attr("data-delimiter")||null,a(b).autocomplete({source:function(c,f){a.getJSON(a(b).attr("data-autocomplete"),{term:d(c.term)},function(){a(arguments[0]).each(function(c,d){var f={};f[d.id]=d,a(b).data(f)}),f.apply(null,arguments)})},search:function(){var a=d(this.value);if(a.length<2)return!1},focus:function(){return!1},select:function(d,f){var g=c(this.value);g.pop(),g.push(f.item.value);if(b.delimiter!=null)g.push(""),this.value=g.join(b.delimiter);else{this.value=g.join(""),a(this).attr("data-id-element")&&a(a(this).attr("data-id-element")).val(f.item.id);if(a(this).attr("data-update-elements")){var h=a(this).data(f.item.id.toString()),i=a.parseJSON(a(this).attr("data-update-elements"));for(var j in i)a(i[j]).val(h[j])}}var k=this.value;return a(this).bind("keyup.clearId",function(){a(this).val().trim()!=k.trim()&&(a(a(this).attr("data-id-element")).val(""),a(this).unbind("keyup.clearId"))}),a(this).trigger("railsAutocomplete.select",f),!1}})}}),a(document).ready(function(){a("input[data-autocomplete]").railsAutocomplete()})})(jQuery);

file.html

Update the data-update-elements value of hourly rate, to match what's given in the second div.

Currently this is the same name, but if i add another item it will change to <input id="quote_labouritems_attributes_1_contractor_id"

<input data-autocomplete="/contractors/autocomplete_contractor_firstname" data-update-elements="{&quot;id&quot;:&quot;#quote_labouritems_attributes_0_contractor_id&quot;,&quot;hourly_rate&quot;:&quot;#quote_labouritems_attributes_0_contractor_rate&quot;}" id="quote_labouritems_attributes_0_contractor_name" name="quote[labouritems_attributes][0][contractor_name]" size="30" type="text" class="ui-autocomplete-input ui-autocomplete-loading" autocomplete="off" role="textbox" aria-autocomplete="list" aria-haspopup="true">



<input id="quote_labouritems_attributes_0_contractor_id" name="quote[labouritems_attributes][0][contractor_id]" type="hidden">