Get value from textarea. Using Javascript

Get value from textarea. Using Javascript

when i try take value from textfeld this code work i do this like that
var name = $("input[name='Event[name]']").serializeArray();
name = name[0].value;
I can't get value from textarea
var desc = $("input[name='Event[desc]']").serializeArray();
Here is a link to workong variant whith textfield. try with textarea .I
didnt understand why textarea doesnt work
jsfiddle.net/32Dgn/1/