Poor man's JavaScript scrolling helper for mobile devices

gistfile1.js

function PoorMansGloveBox(element) {
	this.element = element;
	this.parentHeight = this.element.parentNode.clientHeight;
	this.element.style.position = 'relative';
	this.element.style.top = '0px';
	this.lastPos = 0;
	this.currentPos = 0;
	var self = this;
	this.element.addEventListener('touchstart', function(e){
		self.lastPos = e.touches[0].pageY;
	}, false);
	this.element.addEventListener('touchmove', function(e){
		self.currentPos = e.touches[0].pageY;
		var deltaY = self.currentPos - self.lastPos;
		var newPos = (parseInt(self.element.style.top.substr(0,self.element.style.top.length-2)) + deltaY);
		if (newPos > 0) newPos = 0;
		var viewportDelta = (self.element.clientHeight - self.parentHeight)*1.2;
		var maxScrollBottom = viewportDelta<=0?viewportDelta:viewportDelta*-1;
		if (newPos < maxScrollBottom) newPos = maxScrollBottom;
		self.element.style.top = newPos + 'px';
		self.lastPos += deltaY;
	}, false);
}

function PoorerMansGloveBox(element) {
var parentHeight = element.parentNode.clientHeight;
element.style.position = 'relative';
element.style.top = '0px';
var lastPos = 0;
var currentPos = 0;

element.addEventListener('touchstart', function(e){
      lastPos = e.touches[0].pageY;
}, false);
element.addEventListener('touchmove', function(e){
    currentPos = e.touches[0].pageY;
    var deltaY = currentPos - lastPos;
    var newPos = (parseInt(element.style.top.substr(0,element.style.top.length-2)) + deltaY);
    if (newPos > 0) newPos = 0;
    var viewportDelta = (element.clientHeight - parentHeight)*1.2;
    var maxScrollBottom = viewportDelta<=0?viewportDelta:viewportDelta*-1;
    if (newPos < maxScrollBottom) newPos = maxScrollBottom;
    element.style.top = newPos + 'px';
    lastPos += deltaY;
}, false);

}

Always gotta one up me eh!

Cheers mang, doubling up on variables in a closure = stupid.

Just playin, no up'g
Could probably tweak/squeeze a little more, but it's cool!

waiting to see the Poorest!