function searchSiChange(obj){
	$.ajax({
		type: "POST", 
		url: "/portal/postaddr/addrSearch/searchAddr.do",
		dataType: "json",
		data: "searchAddr="+obj.value, 
		success: searchAddrResult
	});
}
				
function searchAddrResult(oj){
	try {
		var arrSignguNm = oj.signguNm.split("|");
		var tObj = document.getElementById("searchGu");
		removeAll(tObj);
						
		for (var i=0; i<arrSignguNm.length;i++){
			var opt = document.createElement("option");
			opt.value = arrSignguNm[i];
			opt.text = arrSignguNm[i]; 
			tObj.options.add(opt);
		}
	}	
	catch (err){
		alert("예외 오류입니다.");
	}
}

$.ajax({
	type: "POST", 
  	url: "/testpost.jsp",
  	dataType: "json",
  	data: "svalue=text&tvalue=test2", 
  	success: function(msg){
  		alert( "Data : " + msg );
  	}
 });

TIP
ajax 동기화 옵션
async: false,   ==> 해당 문구 추가

$.ajax({
	type: "POST", 
	url: "/ajaxtest/selectAjaxList.do",
	dataType: "json",
	data: "statsCscd=B&rtype=json", 
	success: function(oj){
		var json = eval(oj);
		if (json.length>0){
			var clevel = json[0].clevel;
			for (var i=0;i<json.length;i++){
				$("#tschRegistOrgcd").append("<option value='"+json[i].orgcd+"'>"+json[i].koreanOrgnm+"</option>");
			}
		}
	}
});