rem: return layerPx.add(parseInt(this.layerContainerDiv.style.left), parseInt(this.layerContainerDiv.style.top) ); 
add: var viewPortPx = null; if (layerPx != null) { var dX = parseInt(this.layerContainerDiv.style.left); var dY = parseInt(this.layerContainerDiv.style.top); viewPortPx = layerPx.add(dX, dY); } return viewPortPx; 
context:     getViewPortPxFromLayerPx:function(layerPx) {        return layerPx.add(parseInt(this.layerContainerDiv.style.left),                           parseInt(this.layerContainerDiv.style.top) );    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1027/f3a072b151fd0fb48097965647921f2ea0396651/Map.js/clean/lib/OpenLayers/Map.js