It appears to be seeding a random number generator with your mouse movements.(它似乎是用鼠标移动播种随机数生成器。)
The mouse move handler itself does something along the lines of the following:(鼠标移动处理程序本身可以执行以下操作：)
var b = ((event.X << 16) + event.Y) * (new Date().getTime() % 1000000);
c = c * b % d;
if (previousMouseMoveHandler) previousMouseMoveHandler.call(arguments);
d is (screen.width * screen.width + screen.height) * 1000000 , and c is a variable that starts out as 1.(d是(screen.width * screen.width + screen.height) * 1000000 ， c是一个以1开头的变量。)
All of this is wrapped in the scope of an anonymous function, which itself is immediately evaluated to return a function that is assigned to a property named "random".(所有这些都包含在匿名函数的范围内，该函数本身立即被评估以返回分配给名为“random”的属性的函数。)
That returned function looks something like this:(返回的函数看起来像这样：)
var b = c;
b += parseInt(hash.substr(0,20), 16);
hash = MD5(hash);
return b / (d + Math.pow(16, 20));
hash , BTW, is a variable that starts out as the MD5 hash of the page's cookies, location, the new Date().getTime() , and Math.random() .(hash ，BTW，是一个变量，以页面的cookie，位置， new Date().getTime()和Math.random()的MD5哈希开始。)
(Note, of course, that Google may change the script returned at any time and hence invalidate this analysis)(（请注意，Google当然可以随时更改返回的脚本，从而使此分析无效）)
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