function CSS(){
}
CSS.addClass=function(el,c){
	classRemove(el,c);
	if(el.className.length>0)el.className+=" "+c;
	else el.className=c;
}
CSS.removeClass=function(el,c){
	var cc=el.className.split(" ");
	var cc2=new Array();
	for(var i=0;i<cc.length;i++){
		cc[i]=cc[i].replace(" ","");
		if(cc[i]==c)continue;
		cc2.push(cc[i]);
	}
	el.className=cc2.join(" ");
}
CSS.setOpacity=function(d,o){
	if(BrowserDetect.browser=="Explorer")d.style.filter="alpha(opacity="+Math.round(o*100)+")";
	else d.style.opacity=o;
}
/*
	Obsolete functions.
*/
function classAdd(el,c){
	classRemove(el,c);
	if(el.className.length>0)el.className+=" "+c;
	else el.className=c;
}
function classRemove(el,c){
	var cc=el.className.split(" ");
	var cc2=new Array();
	for(var i=0;i<cc.length;i++){
		cc[i]=cc[i].replace(" ","");
		if(cc[i]==c)continue;
		cc2.push(cc[i]);
	}
	el.className=cc2.join(" ");
}