var oLeft = 0;
var oLength = 700;
var oDef = 700;
var oCtr = 50;
var limitCtr = 0;

function moveLeft(id){
	animate_left(id, oLeft, oLength);	
}

function animate_left(id, left, limit){
	if(left != limit){
		left+= oCtr;
		document.getElementById(id).style.left = (left * (-1)) + 'px';
		setTimeout('animate_left("'+id+'", '+left+', '+limit+')', 5);
	}else{
		limitCtr+=1;
		oLeft += oDef;
		oLength += oDef;
		//setTimeout('moveLeft("'+id+'")', 10);	
	}
}

function moveRight(id){
	if(oLeft != 0){
	animate_right(id, oLeft, oLength);	
	}
}

function animate_right(id, left, limit){	
	if(left != (oLeft - oDef)){
		left-= oCtr;
		document.getElementById(id).style.left = (left * (-1)) + 'px';
		setTimeout('animate_right("'+id+'", '+left+', '+limit+')', 5);
	}else{
		limitCtr-=1;
		oLeft -= oDef;
		oLength -= oDef;
		//setTimeout('moveLeft("'+id+'")', 10);	
	}
}