var prevImg = null;
var object_not_done = true;

function BtnOver(but){
	but.src = but.src.replace('.gif','-over.gif');
}

function BtnOut(but){
	but.src = but.src.replace('-over','');
}

function BtnDown(but){
	if(but.style.filter=='alpha(opacity=50)') return;
	but.style.border='1 inset';
}

function BtnUp(but){
	if(but.style.filter=='alpha(opacity=50)' || but.disabled) return;
	but.style.border='1 solid #ffffff';
}