JQuery :: Multiline Textbox And Javascript Variable Using Ajax?

In my web application I have a textbox called "Address" which is multiline and have 3 rows and 250 characters.

I am calling a javascript function in which i am calling AJAX to send the data to a webservice for some processing but AJAX is unable to process variable which contains multiline text.

I am reading multiline textbox value like this in javascript function.

var puid = document.getElementById('<%=userid.ClientID%>').value;
var paddress = document.getElementById('<%=xaddress.ClientID%>').value;

and passing like this.

$.ajax({
type: "POST",
url : "DataService.asmx/UpdateProfile",
data: "{'puserid': ' " + puid + 'padd': ' " + paddress + " '}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: OnSuccess,
error: OnError
});

If I comment paddress parameters in ajax "data:" it works fine other wise ajax goes on "OnError" ...so how to handle multiline textbox values in javascript.