[dom] Optimize dom-style.js

* Remove unnecessary anonymous function, unused variables.
* Use "Number()" instead of "new Number()".
[dom] Optimize dom-style-ie.js

* Remove unnecessary anonymous function, unused variables.
* Use "===" instead of "==".
Merge branch 'optimize-dom-style' into dev-master
[dom] Build
Merge branch 'dev-master' into dev-3.x