Compare two TextBoxes value in JavaScript

Hello Sir,

Below is the code which I'm using to compare 2 textbox values on button click using JavaScript. 

But here even if the value is less than the available points I'm getting a warring message like

Points scored must be less than or equal available points (Check 1)!

Please help me to resolve

<div>
    <asp:TextBox ID="txt_name" class="form-control" placeholder="Enter Name" runat="server"></asp:TextBox>
    <div class="form-group">
        <label>
            Available Points</label>
        <asp:TextBox ID="txt_availablepoints" Text="70" class="form-control" placeholder="Enter Available Points"
            runat="server" ReadOnly="true"></asp:TextBox>
    </div>
    <div class="form-group">
        <label>
            Points scored</label>
        <asp:TextBox ID="txt_pointscored" class="form-control" placeholder="Enter Points scored"
            runat="server"></asp:TextBox>
    </div>
</div>
<asp:Button ID="btn_save" class="btn btn-info btn-wd" runat="server" Text="Save"
    OnClick="btn_save_Click" OnClientClick="doWork1();return false;" />
<script type="text/javascript">
    var counter = 0;
    var atLeast = 1
    function doWork1() {
        var fv1 = document.getElementById('<%=txt_name.ClientID%>').value;
        var fv4 = document.getElementById('<%=txt_pointscored.ClientID%>').value;
        var fv25 = document.getElementById('<%=txt_availablepoints.ClientID%>').value;
          
            var regex = /^[0-9.0-9]+$/;
           
        if (fv1.length == "") {
            swal("Validate", "Please enter name!", "error");
        }
            
        else if (fv4.length == "") {
            swal("Validate", "Please enter Points scored(Check 1)!", "error");
        }
        else if (regex.test(fv4) == false) {
            swal({
                title: "Warning",
                text: "Please enter only numerics in Points scored(Check 1) field",
                type: "warning",
            });
        }
        else if (fv4 > fv25) {
            swal("Validate", "Points scored must be less than or equal available points(Check 1)!", "error");
        }          
           
        else {
            document.getElementById("btn_save").click();
        }
    }
</script>

Thanks in advance