// Get the elements with class="column"var elements = document.getElementsByClassName("forum");// Declare a loop variablevar i;// List Viewfunction listView() {for (i = 0; i < elements.length; i++) {elements[i].style.width = "100%";}}// Grid Viewfunction gridView() {for (i = 0; i < elements.length; i++) {elements[i].style.width = "50%";}}