function ensureOneMAItem(elem){
	var theInpts = document.getElementsByTagName("input");
	var val = elem.value;
	
	for(var x=0; x<theInpts.length; x++){
		if(theInpts[x].className == "ma-qty-box"){
			theInpts[x].value = 0;
		}
	}
	
	elem.value = val;
}