如何在codeigniter vew頁面中使用javascript來生成onkeyup事件

Question

我想在給定輸入時計算qty *價格，當價格和數量自動變化時應該使用codeigniter中的JavaScript事件更改總計應該禁用我的代碼爲遵循

<script> 
functionn caltotal() 
{ 

} 
</script> 
<?php 
echo form_open('add_veg/insert_data', 'class="form-horizontal" id="myform" role="form"'); 
$sales_date = array(
     'type' => 'date', 
     'name' => 'date', 
     'id' => 'date', 
     'class' => 'form-control' 
); 
$vegnames=array(); 
foreach($veg_names as $r){ 
    $vegnames[$r->value]=$r->label; 
} 
/* 
$vegnames = array(
     'cauliflower' => 'Caulifower', 
     'Brinjal' => 'Brinjal' 
); 
*/ 
$wt = array(
     'type' => 'text', 
     'name' => 'weight', 
     'id' => 'wt', 
     'class' => 'form-control' 
); 
$price = array(
     'type' => 'text', 
     'name' => 'price', 
     'id' => 'price', 
     'class' => 'form-control' 
); 

$total=array(
      'type'=>'readonly', 
      'name'=>'total', 
      'id'=>'total', 
      'class'=>'form-control disabled' 
); 
$save=array(
     'name' =>'sub', 
     'value' =>'Save', 
     'class' =>'btn btn-success btn-sm' 
); 

echo form_label('Sales date', 'sdate', 'class="control-label col-sm-2"'); 
echo form_input($sales_date); 
echo form_label('Vegitable Name', 'vname', 'class="control-label col-sm-2"'); 
//echo form_input($veg_name); 
echo form_dropdown('v_name', $vegnames,'','class="form-control"'); 
echo form_label('Weight', 'wt', 'class="control-label col-sm-2"'); 
echo form_input($wt); 
echo form_label('Price', 'price', 'class="control-label col-sm-2"'); 
echo form_input($price); 
echo form_label('Total', 'total', 'class="control-label col-sm-2"'); 
echo form_input($total); 
echo form_submit($save); 
echo form_close(); 
?> 

Answer 1

試試這個

$('#quantity').keyup(function() { 
     var quantity = $("#quantity").val(); 
     var iPrice = $("#item_price").val(); 

     var total = quantity * iPrice; 

     $("#total_price").val(total); // sets the total price input to the quantity * price 
    });