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我有以下 JavaScript 函数。我有两个文本框、两个隐藏字段和两个标签。和一个按钮。点击一个按钮，我正在调用这个函数。

在文本框中键入值时，它会显示一个 autoCompleteList。在从中选择一个值时，它会从 DB 中获取该值并填充相应的标签。此外，它同时将相应的选定值存储在隐藏字段中。

每当更改文本框中的值且未从自动填充列表中选择值时，它必须显示警报。

该功能工作正常，如果我填写一个文本框，但是当我填写两个时，它会转到 A 点，而不是显示 B 点的警报

function ConfirmBox()
 {
    var txtBoxValue = document.getElementById("<%= txtFromPartNumber.ClientID %>").value;
    var txtBoxValue1 = document.getElementById("<%= txtToPartNumber.ClientID %>").value;
    var release = document.getElementById("<%= lblFromPartNumber.ClientID %>").innerText;
    var release1 = document.getElementById("<%= lblToPartNumber.ClientID %>").innerText;
    var hdnFromValueID = "<%= hdnFromReleaseNumber.ClientID %>";
    var hdnToValueID = "<%= hdnToReleaseNumber.ClientID %>";
     if ((txtBoxValue && txtBoxValue.trim() != "" && release))
     {
         if (document.getElementById(hdnFromValueID).value.trim() == txtBoxValue.trim()) 
         {
             if ((txtBoxValue1 && txtBoxValue1.trim() != "" && release1))  
             {
                 if (document.getElementById(hdnToValueID).value.trim() == txtBoxValue1.trim()) 
                 {
                    return true; //Point A
                 }
                 else
                 {// Point B
                     //alert("To Part no. has been changed. Please enter it again.");
                     var msg = document.getElementById("alertMessage");
                     msg.innerHTML = "To Part no. has been changed. Please enter it again.";
                     var myExtender = $find("ctl00_ContentPlaceHolder1_ModalPopupExtenderAlert");
                     myExtender.show();
                     document.getElementById("<%= txtToPartNumber.ClientID %>").focus();
                     return false;
                 }
             }
             else 
             {
                 //window.alert("Please choose a Valid To Part number");
                 var msg = document.getElementById("alertMessage");
                 msg.innerHTML = "Please choose a Valid To Part number.";
                 var myExtender = $find("ctl00_ContentPlaceHolder1_ModalPopupExtenderAlert");
                 myExtender.show();
                return false;
             }
         }
         else 
         {
             //alert("From Part no. has been changed.Please enter it again.");
             var msg = document.getElementById("alertMessage");
             msg.innerHTML = "From Part no. has been changed.Please enter it again.";
             var myExtender = $find("ctl00_ContentPlaceHolder1_ModalPopupExtenderAlert");
             myExtender.show();
             document.getElementById("<%= txtFromPartNumber.ClientID %>").focus();
             return false;
         }
     }
     else 
     {
         //window.alert("Please choose a Valid From Part number");
         var msg = document.getElementById("alertMessage");
         msg.innerHTML = "Please choose a Valid From Part Number.";
         var myExtender = $find("ctl00_ContentPlaceHolder1_ModalPopupExtenderAlert");
         myExtender.show();
         return false;
     }
 }
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