var downnum = "1";
var down = "view"+downnum;


function downer(num){
	downy = down;
	document[downy].src = eval(downy + "_off.src");	
	down = "view"+num;
	downnum = num;

}

function rollcstdyon(img,num){
	document[img].src = eval(img + "_on.src");
	document.cstdy_left.src = eval("cstdy" + num + ".src");	
}


function rollcstdyoff(img,num){
	//alert("img="+img+", down="+down+", num="+num);
	if (img != down){
		document[img].src = eval(img + "_off.src");	
	}
	else{
		document[img].src = eval(img + "_on.src");	
	}

	document.cstdy_left.src = eval("cstdy" + downnum + ".src");	
	//alert(down);
}



/*function rollcstdy(img,state,num){
	document[img].src = eval(img + "_" + state + ".src");
	document.cstdy_left.src = eval("cstdy" + num + ".src");	
}
*/