JS Call CSS attribute _javascript skill

1, for no underlined CSS properties are generally directly using style. Property name.
such as: Obj.style.margin,obj.style.width,obj.style.left,obj.style.position and so on.

2, for the CSS attribute with the underline, remove each underline and capitalize the first character after each underline.
such as: Obj.style.margintop,obj.style.borderleftwidth,obj.style.zindex,obj.style.fontfamily and so on.

Because float is a reserved word for JavaScript, how do you write float in a style sheet in JS?
We cannot use obj.style.float directly, so the operation is invalid.

The correct way to use it is: IE:obj.style.styleFloat, other browsers Mozilla (Gecko), FF and other styleFloat:obj.style.cssFloat.