function clearvalue(obj){
	if (obj.type == "radio"){
		if (obj.checked){
			obj.checked = false ;
			obj.value = "" ;
		}
	}
}
function onSubmit(form){
	var idx = form.elements.length;
	var isEmpty = "true";
	var i=0;
	for (i=0; i < idx; i++ ){
		if(form.elements[i].type == "radio" && form.elements[i].checked){
			isEmpty = "false";
			break;
		}
	}
	if (isEmpty == "true"){
		alert("Please select atleast one value before submitting.");
		return false;
	}
	if (confirm("Are you sure you want to submit?")){
		return true;
	}else{
		return false;
	}
}