[jQuery] Urgent "&" problem in wordpress

Hi all
I am new to wordpress.I am using $.ajax
$.ajax({
type: "POST",
url: "some.php",
data: "name=John&location=Boston",
success: function(msg){
alert( "Data Saved: " + msg );
}
});
But it will convert "&" into "&#038".
can any one tell me how to fixed this.