js获取对象为null的解决方法_javascript技巧

success:function(data){
var arr = data.split('_');
var numArr = arr[0].split(",");
var numStr = "";
if(numArr.length==undefined || numArr.length==0){
$("#phonenolist").html('对不起,没有查询到相应的号码!');
}else{
for(var i=0;i numStr += "

+ numArr[i].toString()+",n_"+i+");\" class='buy'>"
+ numArr[i].toString().substring(0, 3)
+ ""
+ numArr[i].toString().substring(3, 7) + " "
+ numArr[i].toString().substring(7, 11)
+ "

";
}
$("#phonenolist").html(numStr);
}
index = arr[1];
total = arr[2];
$("#curr").html(' 第'+index+'页,共'+total+'页 ');
}
function choose_mobile(num,id){
alert(num+" "+id);
$("#mobile").val(num);
$("#xhmobile").html("

"+num+"

");
$("#"+id).addClass("buy").siblings().removeClass("buy");
}

numStr += "

+ numArr[i].toString()+"','n_"+i+"');\" class='buy'>"