function leftroll(num, flag) {
	
	var cell = document.getElementById("navleft_" + num );
	var right = document.getElementById("navleftb_" + num );
	var arrow = document.getElementById("navleft_arrow_" + num );
	
	if ( cell && arrow && right ){
	
		if ( flag){
			cell.className = "button2";
			arrow.src = "images/nav/arrow2.gif";
			right.className = "arrowtd2";
		}else{
			cell.className = "button1"
			arrow.src= "images/nav/arrow1.gif";
			right.className = "arrowtd";
		}
	}
}


function topnavroll( flag, num ) {
	
	var cell = document.getElementById("topbutton" + num );
	
	
	if ( cell  ){
	
		num_str = num + "";
		if ( num < 10 ) {
		num_str = "0" + num;
		}
		
		
		if ( flag){
			
			cell.src = "images/treatment/nav/top2/on/on_" + num_str + ".gif";
			
		}else{
			cell.src = "images/treatment/nav/top2/off/off_" + num_str  + ".gif";
		}
	}
}

function imageRoll(image){
	var cur = document.getElementById(image).src;
	var check = cur.indexOf('_norm');
	if(check == -1) {
		document.getElementById(image).src = cur.replace(/_over/,'_norm');
	}else{
		document.getElementById(image).src = cur.replace(/_norm/,'_over');
	}
}

function selectChange(select) {
	document.location = document.getElementById(select).value;
}