Here is the sample.
var RadioButton1 = document.getElementById(LogoSettingId).children[0].children[0].children[0].children[0];
if (RadioButton1.addEventListener)
{
// Non-IE browsers
RadioButton1.addEventListener('onclick', RadioButton1_click, false);
}
else
if (RadioButton1.attachEvent)
{
// IE 6+
RadioButton1.attachEvent('onclick', RadioButton1_click);
}
else
{
// Older browsers
var currentEventHandler = RadioButton1['onclick'];
if (currentEventHandler == null)
{
RadioButton1['onclick'] = RadioButton1_click;
}
else
{
RadioButton1['onclick'] = function(e)
{
currentEventHandler(e); RadioButton1(e);
}
}
}