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Home Backend Development PHP Tutorial 新手求ajax返回值的问题

新手求ajax返回值的问题

Jun 23, 2016 pm 02:05 PM

ajax返回值进入showmsg函数,然后alert(tips)出函数返回的值,但是总显示undefined,是不是返回类型的问题,新手求教~
function showmsg(ms)
{  
    var tips
  switch(ms)
{  
  case 'ding':
  tips='thanx votting';
  break
  case 'cai':
  tips='thanx u done';
  break
  case 'erro':
  tips='404 notfound';
  break; 
  default: tips='erro';
  break;
 
 }return tips;
 }


回复讨论(解决方案)

语法错误了吧,前面两个break 缺少结尾分号,先补齐了。之后在firebug控制台下看报什么错了。

在函数入口处 alert(ms) 观察一下传入的是什么

js 不强制需要行结束符“;”

在函数入口处 alert(ms) 观察一下传入的是什么

js 不强制需要行结束符“;”
其实我在firebug里面看到ajax返回多了2个空格,但是前面我用正则表达是清除了,但是就剩两个空格清不掉,不能完全清除。。返回的是"  1" 不是"1"
       var str=xmlHttp.responseText;
var pass= str.replace(/\r\n/g,"");

语法错误了吧,前面两个break 缺少结尾分号,先补齐了。之后在firebug控制台下看报什么错了。

其实我在firebug里面看到ajax返回多了2个空格,但是前面我用正则表达是清除了,但是就剩两个空格清不掉,不能完全清除。。返回的是"  1" 不是"1"
       var str=xmlHttp.responseText;
var pass= str.replace(/\r\n/g,"");

var pass= str.replace(/\s+/g,""); 这个才是清楚空格,你那个是清楚换行

var pass= str.replace(/\s+/g,""); 这个才是清楚空格,你那个是清楚换行
被你说对了~~没看清~~ 学得不好啊

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