The JavaScript split method is used to create an array from a string.
var strTest = '1,2,3,4';
var aryTest = strTest.split();
document.write(typeof aryTest);
The preceding example demonstrates that when the split method is applied on a string an array object is created. The split method takes an optional argument: The delimiter on which to base the split. Comma is the default.
var strTest = '1|2,3|4';
var aryTest = strTest.split('|');
document.write(aryTest.length);
In this example the split occurs based on a pipe (|) delimiter, so there will only be three elements in this array:
aryTest[0] = 1
aryTest[1] = 2,3
aryTest[2] = 4
