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POJavascript parameter changing values?
 

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    <p>I'm building a running light library on top of raphaeljs. In the code example below I'm trying to iterate through the set of circles in blocks of 5 and animate the blocks individually. </p> <p>What I don't understand is why x has a value of 1 in the first alert and becomes a value of 2 after passing it to the fade function. Any ideas why? I must be overlooking something by can not figure it out... Thanks!</p> <pre><code>Raphael(function() { var r = Raphael("Test"), run = document.getElementById("run"), set = r.set(r.circle(62, 100, 6), r.circle(125, 100, 3), r.circle(139, 100, 3), r.circle(153, 100, 3), r.circle(167, 100, 3), r.circle(181, 100, 3), r.circle(195, 100, 3), r.circle(209, 100, 3), r.circle(223, 100, 3), r.circle(237, 100, 3), r.circle(251, 100, 3), r.circle(265, 100, 3), r.circle(279, 100, 3), r.circle(293, 100, 3), r.circle(307, 100, 3), r.circle(321, 100, 3), r.circle(334, 100, 3), r.circle(348, 100, 3), r.circle(362, 100, 3), r.circle(376, 100, 3), r.circle(390, 100, 3)).attr({ stroke : "none", fill : "#e6e6e6" }), fade = function(obj, id, x) { alert('passed x = ' + x); return function() { obj[(5 * x) - id].attr({ fill : "#49719b", r : 4 }).animate({ fill : "#e6e6e6", r : 3 }, 400); }; }; run.onclick = function() { var i = 0; while (i &lt;= 0) { for (x = 1; x &lt;= 1; x++) { alert('initial x = ' + x); setTimeout(function() { set[0].animate({ "20%" : { callback : fade(set, 0, x) }, "40%" : { callback : fade(set, 1, x) }, "60%" : { callback : fade(set, 2, x) }, "80%" : { callback : fade(set, 3, x) }, "100%" : { callback : fade(set, 4, x) } }, 650); }, i * 650); } i++; } }; }); </code></pre>
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