function btnMouseEnter() {
	srcElem = window.event.srcElement;
	if (srcElem.className == 'btnEnabled') srcElem.className='btnMouseover';
}

function btnMouseLeave() {
	srcElem = window.event.srcElement;
	if (srcElem.className == 'btnMouseover') srcElem.className='btnEnabled';
}

function btnMouseDown() {
	srcElem = window.event.srcElement;
	if (srcElem.className == 'btnMouseover') srcElem.className='btnMousedown';
}

function btnMouseUp() {
	srcElem = window.event.srcElement;
	if (srcElem.className == 'btnMousedown') srcElem.className='btnMouseover';
}