var img = this._thumbs[idx];; 
var img = this._thumbs[idx]; 
	isVisible: function(idx) {		// summary: Returns true if the image at the specified index is currently visible. False otherwise.		var img = this._thumbs[idx];;		if(!img){return false;}		var pos = this.isHorizontal ? "offsetLeft" : "offsetTop";		var size = this.isHorizontal ? "offsetWidth" : "offsetHeight";		var scrollAttr = this.isHorizontal ? "scrollLeft" : "scrollTop";		var offset = img[pos] - this.thumbsNode[pos];		return (offset >= this.thumbScroller[scrollAttr]			&& offset + img[size] <= this.thumbScroller[scrollAttr] + this._scrollerSize);		},
5168	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5168/f5ea9ac9caa9b92a1c961d797899464aec6450d8/ThumbnailPicker.js/buggy/image/ThumbnailPicker.js