Javascript：将字符串作为数组处理工作但不在IE中部署

So this one honestly has me scratching my head. I have a single line of code in my Javascript that does not work when deployed to our test server, but works just fine when run locally from Visual Studio. There's also no problems when running the function in Chrome, regardless of location. It's just a simple line to get the last character of a string, so it's really confusing me why it just stopped working. I'm running IE8 both locally and on the test server (Same machine is browsing, just moved the host).So this one honestly has me scratching my head.