Asp custom validator is not working in IE-11

Question

I am migrating my application from IE 9 to IE 11 with compatibility edge mode. the asp custom validator and required field validator is not working in IE 11, but page.isValid() always returns true. but it works fine in IE 9.

Sample Code:

<asp:DropDownList ID="cboType" onChange="fnInvalid(this,'hidTypeValid');getSelectedValue('cboType','hidliab');changeOptions(document.forms[0].hidliab,document.forms[0].cmbLiability,document.forms[0].hid_liab,document.forms[0].HIDSERLIAB);" runat="server" name="cbotype"AutoPostBack="true"></asp:DropDownList>
                                                            <asp:RequiredFieldValidator ID="VreqvalidateType" runat="server" Display="None" ControlToValidate="cboType" ErrorMessage="-Case Type should not be blank" InitialValue="Choose"></asp:RequiredFieldValidator>

<asp:CustomValidator ClientValidationFunction="fnInvalidSelection" ID="VcustTypeValid"
runat="server" Display="None" ControlToValidate="cboType" ErrorMessage="-Case Type should have valid selection."></asp:CustomValidator>

<asp:CustomValidator ClientValidationFunction="fnTypeFileClass" ID="VcusTypeFile" runat="server" Display="None" ControlToValidate="cboType" ErrorMessage="- Case File Classification should not be empty."></asp:CustomValidator>

 <asp:CustomValidator Enabled="false"ClientValidationFunction="fnTypeCaseHandler"ID="VcusTypeCaseHandler" runat="server" Display="None" ControlToValidate="cboType"ErrorMessage="- Case Handler 1  should not be empty."></asp:CustomValidator>

Javascript:

<pre lang="C#">function fnTypeCaseHandler(sender,args)
    {
    var s = args.Value;
    args.IsValid = true;
        if (s!="K")
        {
        var handler1= document.frmCaseDetails.cmbHandler1.value;
        if (handler1 =="Choose")
        {
            args.IsValid = false;
        }
        }
    return args.IsValid;
    }

function fnTypeFileClass(sender,args)
    {
    var s = args.Value;
    args.IsValid = true;
        if (s!="K")
        {
        var file = document.frmCaseDetails.cmbFileClass.value;
        if (file =="Choose")
        {
            args.IsValid = false;
        }
        }
    return args.IsValid;
    }

Answer 1

这是因为IE-11问题我们已经在页面的标题部分中使IE-11兼容性的<meta>标签运行良好。