The ID of a radio button does not seem to be correct. Refer to
It should be something like, InsertRecordMetalic_Injury0, InsertRecordMetalic_Injury1 ....
Also you do not need == true
<script type= "text/javascript">
function ValueChanged()
{
alert("Function Called");
if(document.getElementById("InsertRecordMetalic_Injury0").checked){
document.getElementById("InsertRecordPrior_Surgery0")0.style.background = "yellow";
}
document.getElementById("InsertRecordPhone").focus();
}
document.getElementById("InsertRecordPrior_Surgery0").onclick= ValueChanged;
</script>
But I am not sure how to change the background color