//set the radio button with the given value as being checked
//do nothing if there are no radio buttons
//if the given value does not exist, all the radio buttons
//are reset to unchecked
function setCheckedValue(radioObj, newValue) {
	//alert(radioObj.name);
	if(!radioObj)
		return;
	var radioLength = radioObj.length;
	if(radioLength == undefined) {
		radioObj.checked = (radioObj.value == newValue.toString());
		return;
	}
	for(var i = 0; i < radioLength; i++) {
		radioObj[i].checked = false;
		if(radioObj[i].value == newValue.toString()) {
			radioObj[i].checked = true;
		}
	}
}

function setChecked(obj){
	obj.checked = !obj.checked;
	setRegButtonDisabled();
}

function setRegButtonDisabled(){ 
	document.getElementById('RegButton').disabled = (!document.getElementById('RegType2SELLER').checked && !document.getElementById('RegType2BUYER').checked);
}

function disableButton(){
	document.getElementById('RegButton').disabled = (!document.getElementById('RegType2SELLER').checked && !document.getElementById('RegType2BUYER').checked);
}