function zoom(mask, bigimg, smallimg) {
	this.bigimg = bigimg;
	this.smallimg = smallimg;
	this.mask = mask
}
zoom.prototype = {
	init: function() {
		var that = this;
		this.smallimgClick();
		this.maskClick();
		this.mouseWheel()
	},
	smallimgClick: function() {
		var that = this;
		$("." + that.smallimg).click(function() {
			$("." + that.mask).fadeIn();
			$("." + that.bigimg).attr("src", $(this).attr("src")).fadeIn()
		})
	},
	maskClick: function() {
		var that = this;
		$("." + that.mask).click(function() {
			$("." + that.bigimg).fadeOut();
			$("." + that.mask).fadeOut()
		})
	},
};