var height = prompt("How high do you want the grid? (1-10 is good)","10");
var width= prompt("How wide do you want the grid? (1-10 is good)","10");
var a_line;
var new_window = window.open("Files\Grid.html","looper","width=400,height=400");
new_window.document.writeln("<h1>A Grid</h1>");
for (height_loop = 0; height_loop < height; height_loop++)
{
  a_line = "";
  for (width_loop = 0; width_loop < width; width_loop++)
  {
    a_line+="x";
  }
  new_window.document.writeln(a_line + "<br>");
}