Getting a not a function error inside

Currently working on a project but getting an error that the code used is not a function which is inside a <form></form>

Our project is a simple registration with auto compute function where in when I input the value on the attendee count, it would automatically show the value below the registration, it also has a view function for us to view the form first before we hit the submit button

<html>
<head>
    <title>Registration Form</title>
    <meta name="viewport" content="width=device-width">
    <link href="C:UsersAdminDesktopRegistration1galvanRegistration111.css" rel="stylesheet" type="text/css">
</head>

<script language="javascript">

function viewInput()
    {
        document.getElementById("KEG1").innerHTML = document.getElementById("KFname").value;
        document.getElementById("KEG2").innerHTML = document.getElementById("KLname").value;
        document.getElementById("KEG3").innerHTML = document.getElementById("KEmail").value;
        document.getElementById("KEG4").innerHTML = document.getElementById("KArea").value;
        document.getElementById("KEG5").innerHTML = document.getElementById("KPtn").value;
        document.getElementById("KEG6").innerHTML = document.getElementById("KAddress").value;
        document.getElementById("KEG7").innerHTML = document.getElementById("KCity").value;
        document.getElementById("KEG8").innerHTML = document.getElementById("KState").value;
        document.getElementById("KEG9").innerHTML = document.getElementById("KZip").value;
        document.getElementById("KEG10").innerHTML = document.getElementById("KCountry").value;
        document.getElementById("KEG11").innerHTML = document.getElementById("KCompany").value;
        
    }

    var numOne, numTwo, res, temp;
function compute()
{
  numOne = parseInt(document.getElementById("value1").value);
  numTwo = parseInt(document.getElementById("KAttendee").value);
  if(numOne && numTwo)
  {
    temp = document.getElementById("res");
    temp.style.display = "block";
    res = numOne * numTwo;
    document.getElementById("compute").value = "$" + res;
  }
}

function checkforblank() {

if (document.getElementById('KFname').value == "") {
    alert('Please enter your FIRST NAME');

    return false;   
}

if (document.getElementById('KLname').value == "") {
    alert('Please enter your LAST NAME');
    return false;
}

if (document.getElementById('KEmail').value == "") {
    alert('Please enter your EMAIL ADDRESS');
    return false;
}

if (document.getElementById('KArea').value == "") {
    alert('Please enter the AREA CODE');
    return false;
}

if (document.getElementById('KPtn').value == "") {
    alert('Please enter your PHONE NUMBER');
    return false;
}

if (document.getElementById('KAddress').value == "") {
    alert('Please enter your ADDRESS');
    return false;
}

if (document.getElementById('KCity').value == "") {
    alert('Please enter your CITY');
    return false;
}

if (document.getElementById('KState').value == "") {
    alert('Please enter your STATE');
    return false;
}

if (document.getElementById('KZip').value == "") {
    alert('Please enter the ZIP CODE');
    return false;
}

if (document.getElementById('KCountry').value == "") {
    alert('Please enter your COUNTRY');
    return false;
}

if (document.getElementById('KCompany').value == "") {
    alert('Please enter the name of the COMPANY');
    return false;
}

if (document.getElementById('KAttendee').value == "") {
    alert('Please enter the count of ATTENDEES');
    return false;
}

}

</script>

<body style="background-color: #ccd1d1"; text-align="MIDDLE">

<h1>Registration Form</h1>


<form method="post" action="C:UsersAdminDesktopRegistration1galvanMainPage.html" >
<table Name="Full Name">
 
<tr>
    <td><label>Full Name :</label></td>
    <td><input required type="text" id="KFname"><br></td>
    <td><input required type="text" id="KLname"><br></td>
</tr>

<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">First Name</label></td>
    <td><label class="lowerTxt">Last Name</label></td>
</tr>
</table>

<table Name="Email">
<tr>
    <td><label>E-Mail :</label></td>
    <td><input type="text" class="long" id="KEmail"><br></td>
</tr>
    
<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">[email protected]</label></td>
    </tr>
</table>

<table Name="Phone Number" Class="TablePhone">
<tr>
    <td><label>Phone Number :</label></td>
    <td><input type="number" id="KArea"
        oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);" maxlength="3"><br></td>
    <td><input type="number" id="KPtn"
        oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);" maxlength="10"><br></td>
</tr>
    
<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">Area Code</label></td>
    <td><label class="lowerTxt">Phone Number</label></td>
</tr>
</table>

<table Name="TableAddress">
<tr>
    <td><label>Address :</label></td>
    <td><input type="text" class="long" id="KAddress"><br></td>
</tr>
    
<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">Street Address</label></td>
</tr>
</table>    

<table Name="TableCity">
<tr>
    <td><label></label></td>
    <td><input type="text" id="KCity"><br></td>
    <td><input type="text" id="KState"><br></td>
</tr>

<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">City</label></td>
    <td><label class="lowerTxt">State/Province</label></td>
</tr>
</table>

<table class="TableZip">
<tr>
    <td><label></label></td>
    <td><input type="number" id="KZip"
        oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);" maxlength="4"><br></td>
    <td><input type="text" id="KCountry"><br></td>
</tr>
    
<tr>
    <td><label></label></td>
    <td><label class="lowerTxt">Postal/Zip Code</label></td>
    <td><label class="lowerTxt">Country</label></td>
</tr>
</table>

<table Name="Company">
<tr>
    <td><label>Company Name :</label></td>
    <td><input type="text" class="long" id="KCompany"><br></td>
</tr>
</table>

<table Name="Attendee">
<tr>
    <td><label>Attendee Count :</label></td>
    <input id="value1" type="hidden" value="500">
    <td class="dollar">$500 x <input type="number" class="value2" id="KAttendee"
        oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);" maxlength="2" min='1' max='10'
        onclick="compute()" onkeyup="compute()" required></td>
</tr>
<tr>
    <td><label></label></td>
    <td class="Max">Max 10 Attendee</td>
</tr>
    

<script for ="value2">
        document.getElementsByClassName('value2')[0].oninput = function () {
        var max = parseInt(this.max);
        if (parseInt(this.value) > max) {
            this.value = max; 
        }
    }
</script>
</tr>
</table>

<br>

<div Name="Button1">
    <button class="Button1" type="submit" value="VIEW" onclick="viewInput(), checkforblank(); return false">VIEW</button>
</div>




<br>

<h1>Your Information</h1>

<div name="viewform">
    <p><label class="info1">FIRST NAME:</label>
    <span class="info2" id='KEG1' style="text-transform: uppercase;"></span></p>
    
    <p><label class="info1">LAST NAME:</label>
    <span class="info2" id='KEG2' style="text-transform: uppercase;"></span></p>
        
    <p><label class="info1">EMAIL:</label>
    <span class="info2" id='KEG3' style="text-transform: uppercase;"></span></p>
        
    <p><label class="info1">PHONE NUMBER:</label>
    <span class="info2" id='KEG4' style="text-transform: uppercase;"></span>
    <span class="info2" id='KEG5' style="text-transform: uppercase;"></span>
    </p>
        
    <p><label class="info1">ADDRESS:</label>
    <span class="info2" id='KEG6' style="text-transform: uppercase;"></span>
    <span class="info2" id='KEG7' style="text-transform: uppercase;"></span>
    <span class="info2" id='KEG8' style="text-transform: uppercase;"></span>
    <span class="info2" id='KEG9' style="text-transform: uppercase;"></span>
    <span class="info2" id='KEG10' style="text-transform: uppercase;"></span>
    </p>
        
    <p><label class="info1">COMPANY NAME:</label>
    <span class="info2" id='KEG11' style="text-transform: uppercase;"></span></p>
        
    <p><label class="info1">ATTENDEE COUNT:</label>
    <span class="info2" id='KEG12' style="text-transform: uppercase;"></span>
    </p>

    <p id="res"><label class="info1">TOTAL AMOUNT:</label>
    <input class="add" id="compute">
    </p>
</div>

<br>

<div Name="Button2">
    <input class="Button2" type="submit" onclick="viewInput()">
</div>


</form>
</body>

</html>