var lastColor ="white";
var standardColor = "transparent"

function buset(imgName){
    butName = imgName + "";
    imgSrc = imgName + "a.src";
    document.images[butName].src = eval(imgSrc);
}

function buunset(imgName){
    butName = imgName + "";
    imgSrc = imgName + "p.src";
    document.images[butName].src = eval(imgSrc);
}
	
function mset(imgName){
    buset(imgName);
}

function munset(imgName){
	if(imgName == fixID){
		butName = imgName +"";
		imgSrc = imgName + "a.src";		
		document.images[butName].src = eval(imgSrc);
	}	

	if (imgName !== fixID)	{
		butName = imgName + "";
		imgSrc = imgName + "p.src";
		document.images[butName].src = eval(imgSrc);
	}
}

function fix(imgName){
    butName = unfixID +"";
    imgSrc = unfixID + "p.src";
    document.images[butName].src = eval(imgSrc);
    fixID = imgName;
    butName = imgName +"";
    imgSrc = imgName + "a.src";
    document.images[butName].src = eval(imgSrc);
    unfixID = fixID;
}