function removeCssStyle(Obj, cssClass){
	if(Obj && Obj.className){
		var currentStyle = new String;
		currentStyle=Obj.className;
		if(currentStyle.indexOf(cssClass) != -1)
			Obj.className = currentStyle.replace(cssClass, "");
		//alert(Obj.id);
	}
}

function addCssStyle(Obj, cssClass){
	if(Obj && (Obj.className || Obj.className == "")){
		var currentStyle = new String;
		currentStyle=Obj.className;
		if(currentStyle.indexOf(cssClass) == -1)
			Obj.className += " " + cssClass;
		//alert(Obj.id + Obj.className);
	}
}

function rollOver(Obj, doRoll, type){
	if(Obj){
		var cssRollClass = type + "Roll";
		if(doRoll)
			addCssStyle(Obj, cssRollClass);
		else
			removeCssStyle(Obj, cssRollClass);
	}
}