//课程最外面index.asp调用使用
function changeImg(s)
{
		MyNewStyle = s;
		if (typeof(top.list)!= "undefined"){
	    ChangeBgImg(top.list,"td");
	    ChangeBgImg(top.list,"table");
	    }
		if (typeof(top)!= "undefined"){
	    ChangeBgImg(top,"td");
	    ChangeBgImg(top,"table");
	    }
		MyStyle = MyNewStyle;
	CreateCookie("MyStyle",MyNewStyle,30)
}