function goSetHeight()
{
	if( isFunction( parent.setIframeHeight ) )
	{
		if (parent == window)
			return;
		// no way to obtain id of iframe object doc loaded into? no parentNode or parentElement or ...
		else
			parent.setIframeHeight( 'content' );
	}
}

// Behoud huidige onload-aanroepen:
var nowOnload = window.onload;
window.onload = function ()
{
	if(nowOnload != null && typeof(nowOnload) == 'function')
		nowOnload( );

	goSetHeight( );
}

function isFunction( a )
{
    return typeof a == 'function';
}