Interpretation of m$ Source code: JavaScript + CSS implementation layer translation and dynamic display

<!--interpretation m$ source code: JavaScript + CSS implementation layer translation and dynamic display-->
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<!--This article mainly by JavaScript and CSS implementation of layer translation and dynamic display-->
<!--little Brother's JavaScript level is really bad enough, so the following annotations are personal understanding, there are omissions and improper place also please you to correct the-->
<!--The following source code originates from the DISCOVER directory of the m$ Windows Professional installation CD, where changes are shown in the document's most annotated-->
<script language= "JavaScript" >
var StarTV = 0.5;
var endv = 1;
var Midv;
var Inc = 0.12;
var power = 3;
/* INC and power to control the change of alpha per cycle and the total number of cycles * *
var mSec = 20;
var Slstartv;
var slendv;
var slinc;
var MSec;
var opensec = 20;//time required to complete the control cycle
var slpower;
function Fadelogo () {
if (Endv > 9999) {
StarTV = StarTV + Inc;
Midv = Math.sin (STARTV) + 1;
ENDV = Math.pow (midv,power);
* * Personally think that the form such as "int i;i=1;i++" way to define ENDV, can also achieve the effect of alpha change, but that is only a uniform change, less than the use of the dynamic just * *
document.all.brandLogo.filters.alpha.opacity = document.all.brandLogo.filters.alpha.opacity + endv;
document.all.Discover.filters.alpha.opacity = document.all.Discover.filters.alpha.opacity + endv;
document.all.Marketing.filters.alpha.opacity = document.all.Marketing.filters.alpha.opacity + endv;
/* To achieve the continuity of alpha and translation, you can also add a constant after ENDV, so the control will be easier
alert (document.all.Discover.filters.alpha.opacity);
* * As my general Rookie, alert method can be used to track a variable to achieve the desired effect, just be careful not to appear dead cycle, then don't scold me Oh ~ ~