jQuery ajax结果数据

Question

I'm having trouble using the return data within my ajax call. What is the best way to go about this?

I simply send information to checker.jsp. It computes it. If the check is good, it responds with a Green. If it's bad, it responds with a Red.

If I use this within the success:

alert(light_color);

I get what seems to be the entire web page with the word "Red" 40 lines down. Because of this the if and elses do not work. I want to use the result and only the result. Not the html and everything in it.

What am I doing wrong?

Any help would be appreciated!

 $.ajax({
        type: 'POST',
        url: 'checker.jsp',
        data: {
            'bank_cnt': bank_cnt
        },
        success: function (result) {
            var light_color = result;
            if (light_color === 'Red') {
              alert('Red');  
            } else if (report === 'Green') {
                alert('Green');
            } else {
                alert('didnt work');
            }
        }
    });