Send a value from PHP to JS, but return a strange value? Solution Ideas

Send a value from PHP to JS, but return a strange value?
I'm going to pass a 0 to b.js from a.php, but it's a bunch! The original code is as follows:


a.php file:

echo "0";

?>


B.js file:

function Get_c ()
{
if (xmlhttp.readystate==4 | | xmlhttp.readystate== "complete")
{
var c = Xmlhttp.responsetext;
alert (c);
}
}

The result of the dialog output is a whole bunch of characters:




Untitled Document





0

What's going on? Can you get rid of the whole pile of the front?




------Solution--------------------
A output JSON
B Read JSON alert
------Solution--------------------
Where did the big piece of HTML come from earlier? Check the source code after you perform a.php alone to see. See if there is HTML code.

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