Existing Product Code Check
view page < div class = "form-group" > < label class = "control-label col-md-3 col-sm-3 col-xs-12" > Product Code < span class = "required" > * </ span > </ label > < div class = "col-md-6 col-sm-6 col-xs-12" > < input type = "text" name = "pro_code" id = "productcode" onkeyup = " checkProductCode ();" required class = "form-control col-md-7 col-xs-12" placeholder = 'Product Code' value = " <?php echo $pro_code ; ? > " > < div id = "productcode_response" style = " co...