[This is preliminary documentation and subject to change]
Returns an array with specified elements inserted at the beginning.
arrayObj.unshift([item1[, item2 [, . . . [, itemN]]]])
arrayObj
Required. An Array object.
item1, item2,. . ., itemN
Optional. Elements to insert at the start of the Array.
The unshift method inserts elements into the start of an array, so they appear in the same order in which they appear in the argument list.
Applies To: Array Object