function init(){	var x,y;	if (self.pageYOffset) // all except Explorer	{		x = self.pageXOffset;		y = self.pageYOffset;	}	else if (document.documentElement && document.documentElement.scrollTop)		// Explorer 6 Strict	{		x = document.documentElement.scrollLeft;		y = document.documentElement.scrollTop;	}		else if (document.body) // all other Explorers	{		x = document.body.scrollLeft;		y = document.body.scrollTop;	}	var myOffsetTop, pane, newOffsetTop;		pane = document.getElementById('preview-pane');	myOffsetTop = 66; /*y displacement*/	if (y > myOffsetTop)	{		newOffsetTop = y - myOffsetTop;	} 	else if (y <= myOffsetTop)	{		newOffsetTop =  0;		} 	pane.style.marginTop = newOffsetTop+'px';}window.onresize=init;