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Unexpected result of String.indexOf?

I literally pull my hair out on this ...

Here is the situation. I have two javascript lines:

dsName = "Test 1"
replacementString = "Test "

I am trying to check if dsName is started with replacement String with the following code:

if(dsName.indexOf(replacementString) == 0)
{
    // I never get here!
}

indexOf returns -1 !! How is this possible? I can put a breakpoint in the debugging Chrome script right before this line and paste in the console "dsName.indexOf (replacementString)" and see that it really returns -1.

Now just to prove that I'm not crazy, I can print dsName from the same breakpoint, and it is actually “Test 1”, and replacementString is “Test”. Here is the actual screenshot from the Chrome debugging console:

enter image description here

, , , , , , . String (replaceString) replaceString.toString(), , , , .

, indexOf , .

, - , ? Chrome?

+3
2

, , , - ...

replaceText <textarea>, white-space:nowrap. , nowrap , (ASCII- 160), .

js-, , : http://jsfiddle.net/Jk9Cw/

, , ? " , " " , , "?

+1

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for (var i=0; i<replacementString.length; i++) 
    console.log(replacementString.charCodeAt(i));

:

replacementString = replacementString.replace(String.fromCharCode(160), " ");
+6

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