function pushArray(array1, newValue) { array1.push(newValue.value); newValue.value = ""; showArray(array1); lengthArray(array1); } function popArray(array1, displayField) { displayField.value = ""; var popped = array1.pop(); displayField.value = popped; showArray(array1); lengthArray(array1); } function unshiftArray(array1, newValue) { array1.unshift(newValue.value); newValue.value = ""; showArray(array1); lengthArray(array1); } function shiftArray(array1, displayField) { displayField.value = ""; var shifted = array1.shift(); displayField.value = shifted; showArray(array1); lengthArray(array1); }