// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
};

function adjustLeftNav () {
	var arrayPageScroll = getPageScroll();
	var top = arrayPageScroll[1];
	if (top < 200) {
		
	} else {
		topPx = top-200;
		document.getElementById('left').getElementsByTagName('ul')[0].style.marginTop = topPx+"px";
	}
};

window.onscroll = adjustLeftNav;