function marginChangerLeft(number, amount) {
	var elementId = "gallery";
	var newId = elementId + number;
		
	var theObject = document.getElementById(newId);
		
	var currentLeftMargin = parseInt(theObject.style.marginLeft);
	
	var amount = amount - 4;
	
	var maxMargin = amount * -213 - 100;
	
	if(currentLeftMargin > maxMargin) {
			
		var newMargin = currentLeftMargin - 213;
			
		theObject.style.marginLeft = newMargin + "px";
			
	}

}
	
function marginChangerRight(number) {
	var elementId = "gallery";
	var newId = elementId + number;
	
	var theObject = document.getElementById(newId);	
		
	var currentLeftMargin = parseInt(theObject.style.marginLeft);
			
	if(currentLeftMargin < 0) {
			
		var newMargin = currentLeftMargin + 213;
			
		theObject.style.marginLeft = newMargin + "px";
			
	}
		
}