var json = '{"result":true,"count":1}',
    obj = JSON.parse(json);

alert(obj.count);
			
			

正則替換手機號碼

			
    var str = "13113668890"; 
    var res = str.replace(/([0-9]{1,3})([0-9]{1,4})([0-9]{1,4})/, "$1****$3");