var upload_range = 1;
var max_upload_slots = 9;

function addUploadSlot(num){
	if(upload_range < max_upload_slots){
		if(num == upload_range){
			var up = document.getElementById('upload_slots');
			var dv = document.createElement("div");
			
			dv.innerHTML = '<input type="file" name="datei' + upload_range + '" size="50" onChange="addUploadSlot('+(upload_range + 1)+')" onKeypress="return handleKey(event)">';
			up.appendChild(dv);
			upload_range++;
		}
	}
}