Javascript：if语句上出现奇怪的非法字符错误

Question

I've been struggling with a strange syntax error since yesterday: The FF debugger keeps saying "SyntaxError: illegal character" at this specific line :

function newTimePeriod(ID, param, paramID, unit)
{
    updateSession();
    //check if date
    //(I got this regex from another post)
    var re = new RegExp("^\\d{4,4}(-\\d{1,2}){1,2}( \\d{1,2}(:\\d{1,2}){1,2})?$");

    var dateFrom = document.getElementById("chart_date_min_" + ID).value;
    var dateTo = document.getElementById("chart_date_max_" + ID).value;
    var fromCorrect = re.test(dateFrom);  
    var toCorrect = re.test(dateFrom);  
    /**/if (fromCorrect && toCorrect)​{/**/   //return illegal character
    LoadGraph(ID, param, paramID, unit, dateFrom, dateTo);
    }
}

I tried to include this script into the main php page, or separate it; it doesn't change a thing. Charset used is UTF-8, and fromCorrect and toCorrect returns booleans correctly (the regex is working)

When I remove the if statement the script is loading... Notepad++ doesn't show any special characters hiding anywhere.

Any thoughts?

Answer 1

I have copied your code into a fiddle - seems you have a zero-width space between the braces:

if (fromCorrect && toCorrect)​{
                             ^

Answer 2

解决因复制和粘贴而产生的怪异字符的好方法是手动重新键入相关行。