function addClass(target, classValue){
	var pattern = new RegExp("(^| )" + classValue + "( |$)");
	if(!pattern.test(target.className)){
		if(target.className == ""){
		target.className = classValue;
		}else{
		target.className += " " + classValue;
		}
	}
	return true;
} // end addClass

function removeClass(target, classValue){
	var removedClass = target.className;
	var pattern = new RegExp("(^| )" + classValue + "( |$)");
	removedClass = removedClass.replace(pattern, "$1");
	removedClass = removedClass.replace(/ $/, "");
	target.className = removedClass;
	return true;
} // end removeClass

addEvent(window, 'load', common_initialise, false);

function common_initialise(){

} // end common_initialise