<script type="text/javascript">
// common page load functions
function pageLoad()
{
    // common pageload functions go here
    alert('This code is executed on PageLoad');
}

if(window.attachEvent)
{
    window.attachEvent('onload', function(e)
        {
            pageLoad();
        }
    );
}
else
{
    window.addEventListener('load', function(e)
        {
            pageLoad();        
        }, true    
    );
}
</script>