$("#sel_div .select_class option[id='-選擇省-']").text(data.province).attr("selected",true);
 $("#sel_div .select_class option[id='-選擇市-']").text( data.city).attr("selected",true);
 $("#sel_div .select_class option[id='-選擇區-']").text( data.area).attr("selected",true);
 $("#sel_div .select_class option[id='-選擇街-']").text( data.street).attr("selected",true);

$("#sel_div .select_class option").each(function(){ //遍歷所有option標簽

 var text = $(this).text(); //獲取option的text
 alert(text);//顯示的是當前這個option的text值
　　　if(txt == "選擇省")
 $("#sel_div .select_class option[id='-選擇省-']").text(data.province).attr("selected",true);
 if(txt == "選擇市")
 $("#sel_div .select_class option[id='-選擇市-']").text( data.city).attr("selected",true);
 if(txt == "選擇區")
 $("#sel_div .select_class option[id='-選擇區-']").text( data.area).attr("selected",true);
 if(txt == "選擇街")
 $("#sel_div .select_class option[id='-選擇街-']").text( data.street).attr("selected",true);

 });

$("#sel_div .select_class option[id="+data.province+"]").attr("selected",true);
$("#sel_div .select_class option[id="+data.city+"]").attr("selected",true);
$("#sel_div .select_class option[id="+data.area+"]").attr("selected",true);
$("#sel_div .select_class option[id="+data.street+"]").attr("selected",true);

var map = $("#sel_div .select_class option").map(function(){

 alert($(this).text());//顯示單個option的text text1

 return $(this).text();
 }).get().join(",");

alert(map);//顯示的是 text1，text2，text3
alert(map[0]);//顯示 t

var array = new Array();
 $("#leaf .form-control option").map(function(){
 array.push($(this).text());
 })
 for(var i = 0; i < array.length; i ++ ){
 alert(array[i]);//顯示每個option的text text1，text2，text3
 }