Early Bird Rate - Pay in Full by 01/31/15

Early Bird Rate - Pay in Full by 06/30/15

Early Bird Rate - Pay in Full by 09/10/15

Paste the code below into an HTML element.
Then adjust the item#_#_radio ID's in the code below to the actual ID's on your radio buttons.

<script>
function codeAddress() {

var dNow= new Date();
var dateOne = new Date('01/31/2015');
var dateTwo = new Date('06/30/2015');
var dateThree = new Date('09/10/2015');
if (dNow >= dateOne) {
document.getElementById("item1_0_radio").disabled = true;
document.getElementById("item4_0_radio").disabled = true;
document.getElementById("item5_0_radio").disabled = true;
document.getElementById("item6_0_radio").disabled = true;

document.getElementById("item1_0_radio").checked = false;
document.getElementById("item4_0_radio").checked = false;
document.getElementById("item5_0_radio").checked = false;
document.getElementById("item6_0_radio").checked = false;
}
if (dNow >= dateTwo) {
document.getElementById("item1_1_radio").disabled = true;
document.getElementById("item4_1_radio").disabled = true;
document.getElementById("item5_1_radio").disabled = true;
document.getElementById("item6_1_radio").disabled = true;

document.getElementById("item1_1_radio").checked = false;
document.getElementById("item4_1_radio").checked = false;
document.getElementById("item5_1_radio").checked = false;
document.getElementById("item6_1_radio").checked = false;
}
if (dNow >= dateThree) {
document.getElementById("item1_2_radio").disabled = true;
document.getElementById("item4_2_radio").disabled = true;
document.getElementById("item5_2_radio").disabled = true;
document.getElementById("item6_2_radio").disabled = true;

document.getElementById("item1_2_radio").checked = false;
document.getElementById("item4_2_radio").checked = false;
document.getElementById("item5_2_radio").checked = false;
document.getElementById("item6_2_radio").checked = false;
}
}

window.onload = codeAddress;
</script>
<script type="text/javascript">
var allRadios = document.querySelectorAll('input[type=radio]')
var booRadio;
var x = 0;
for(x = 0; x < allRadios.length; x++){

allRadios[x].onclick = function() {
if(booRadio == this){
this.checked = false;
booRadio = null;
}else{
booRadio = this;
}
};
}
</script>