I've been using code like "document.getElementById(str).style.backgroundColor = "#ccff99";" to dynamically change the color of a cell in my sudoku grid where str will be "a"+x+y. The code used to execute when it was encountered in chrome, firefox and IE. Now it has stopped working in Chrome, but works unchanged in firefox and IE. In chrome, the color change now only appears after the function containing the code finishes. This change seems to have occurred a couple of months ago and I am struggling to find a work-around. This is a pity as I much preferred chrome for its superior performance overall. Am I alone with this problem, and can anyone offer suggestions for a work-around?