function format(name){
			
		var p1, p2, p3;	
		var element = document.getElementById(name);
		var entry = element.value;
		var newValue;
		
		p1 = entry.substr(0, 3);
		p2 = entry.substr(4, 3);
		p3 = entry.substr(8, 4);
		
		if(p1.length == 3) {
		
			if(p2.length == 3){
				newValue = p1 + "-" + p2 + "-" + p3;
			} else {
				newValue = p1 + "-" + p2;
			}
		
		} else {
			newValue = p1;
		}
		
		element.value = newValue;
		
	}