JavaScript - Javascript Function Not Working In Ie8

<script type="text/javascript">
  function disable(element)
  {
    var input = document.getElementById(element).getElementsByTagName("input");
    for(var i = 0; i < input.length; i++)
    {
      input[i].setAttribute("disabled","true");
    }
  }
</script>

<script type="text/javascript">
  function enable(element)
  {
    var input = document.getElementById(element).getElementsByTagName("input");
    for(var i = 0; i < input.length; i++)
    {
      input[i].setAttribute("disabled","false");
    }
  }
</script>

<form>
  <input type="radio" name="test" onclick="disable('D1')" /> disable<br/>
  <input type="radio" name="test" onclick="enable('D1')" /> enable<br/>
  <fieldset id="D1">
    <input class="" type="text" value="test value1" /><input class="" type="text" value="test value2" /><br/>
    <input class="" type="text" value="test value3" /><input class="" type="text" value="test value4" /><br/>
    <input class="" type="text" value="test value5" /><input class="" type="text" value="test value6" /><br/>
  </fieldset>
</form>

<form>
  <input type="radio" name="test" onclick="disable('D1')" />
  <fieldset id="D1">
    <input class="" type="text" value="test value1" /><input class="" type="text" value="test value2" />
  </fieldset>
  <input type="radio" name="test" onclick="disable('D2')" />
  <fieldset id="D2">
    <input class="" type="text" value="test value3" /><input class="" type="text" value="test value4" />
  </fieldset>
  <input type="radio" name="test" onclick="disable('D3')" />
  <fieldset id="D3">
    <input class="" type="text" value="test value5" /><input class="" type="text" value="test value6" />
  </fieldset>
</form>

function unhighlight(x) {
x.style.backgroundColor="transparent"
}

Function ActivationFuction()
{
activate.function="unhighlight"
}

var myvar1 = '';
var myvar2 = new array();
var myvar3 = new array();
var myvar4;
var myvar5 = 60;
var myvar6 = '';

function myfunc1(){
 myvar1 = 'hello';
 return myvar1;
}

function myfunc2(somenum=0){
 myvar5 = somenum;
 //calling myfunc1() from within this function.
 //do something in here
}

function myfunc3(){
 //calling myfunc1() from within this function.
 for(i=0;i<somelength;i++){
   myvar2 = myvar3[i]; (something to put into the array)
 }
}

var myobj1 = function(){
 this.myvar1 = '';
 this.myvar2 = new array();
 this.myvar3 = new array();
 this.myvar4;
 this.myvar5 = 60;
 this.myvar6 = '';

 var myfunc1 = function(){
  this.myvar1 = 'hello';
  return this.myvar1;
 }

 var myfunc2 = function(somenum=0;){
  this.myvar5 = somenum;
  //calling this.myfunc1() from within this function.
  //do something in here
 }
}

function myfunc3(){
 //calling mynewobj.myfunc1() from within this function.
 for(i=0;i<somelength;i++){
   mynewobj.myvar2 = mynewobj.myvar3[i]; (something to put into the array)
 }
}

var mynewobj = myobj1;

<script type="text/javascript"> // script element to add the votes.js

function totalVotes(votes1){ // script element that will calculate the array
 ****var total = 0;
 ****for (var i = 0; i < votes1.length; i++) {
 *******total = total + votes1[i];
 ****}
 ****return total;
}
</script>

<script type="text/javascript">
	function ReadForm(obj1) {
        "use strict";
		var amt = obj1.amount.value;
		obj1.amount.value = amt - (amt / 6.6);
	}
</script>

<script type="text/javascript">
var decide = function() {
	var choice = document.getElementById("Decision");
	var apprvd = document.getElementById("approved");
	var deny = document.getElementById("denied");
	
	if (choice.value == "Approved")
	{
		deny.style.disabled = "disabled";
		deny.style.visibility = "hidden";
		apprvd.style.disabled = false;
		apprvd.style.visibility = "visible";
	}
	if (choice.value == "Denied")
	{
		apprvd.style.disabled = "disabled";
		apprvd.style.visibility = "hidden";
		deny.style.disabled = false;
		deny.style.visibility = "visible";
	}
	}
</script>

<a href="javascript:void();" onclick="sendRequest()">Send the request</a>

<script>
var request = {
    method: 'postrequest',
    message: 'You will like it',
    data: '123key'
};
function sendRequest() {
    postReq(request, function (a) {
        if (a && a.post_id) {
             
//Do something if sent
            
        } else {

//Do something if cancelled
       
        }
    })
}
</script>

<script type="text/javascript">
	function bonus()
	{
	var sales 
	var excellent 
	var good 
	var fair
	var poor
	
	sales= document.workBonus.txtSales.value;
	sales= parseInt(sales);
	excellent= document.workBonus.chkExc.value;
	good= document.workBonus.chkGood.value;
	fair= document.workBonus.chkFair.value;
	poor= document.workBonus.chkPoor.vaule;
	
	
		if (sales && excellent)
		{
		alert(sales * .20)
		}
		else if (sales && good)
		{
		alert(sales * .10)
		}
		else if (sales && fair)
		{
		alert(sales * .05)
		}
		else if (sales && poor)
		{
		alert(sales * .01)
		}
	
	}

</script>

document.getElementByID("weatherIcon").innerHTML="<img src=\"Icon Sets/"+iconSet+"/"+MiniIcons[obj.icon]+iconExt/" border=2 onclick=\"refresh();\">"

function refresh()
{
weatherRefresherTemp();
}