// -------------------------
// Multiple File Upload
// -------------------------
function MultiSelector(list_target, max) {
	this.list_target = list_target;
	this.count = 0;
	this.id = 0;
	if (max) {
		this.max = max;
	} else {
		this.max = -1;
	};
	this.addElement = function (element) {
		if (element.tagName == 'INPUT' && element.type == 'file') {
			element.name = 'attachment[file_' + (this.id++) + ']';
			element.multi_selector = this;
			element.onchange = function () {
				var new_element = document.createElement('input');
				new_element.type = 'file';
				this.parentNode.insertBefore(new_element, this);
				this.multi_selector.addElement(new_element);
				this.multi_selector.addListRow(this);
				this.style.position = 'absolute';
				this.style.left = '-1000px';
			};
			if (this.max != -1 && this.count >= this.max) {
				element.disabled = true;
			};
			this.count++;
			this.current_element = element;
		} else {
			alert('Error: not a file input element');
		};
	};
	this.addListRow = function (element) {
		var new_row = document.createElement('li');
		var new_row_button = document.createElement('a');
		new_row_button.setAttribute('id', 'remove');
		new_row_button.title = 'Remove This Attachment';
		new_row_button.href = '#';
		new_row_button.innerHTML = 'Remove';
		new_row.element = element;
		new_row_button.onclick = function () {
			this.parentNode.element.parentNode.removeChild(this.parentNode.element);
			this.parentNode.parentNode.removeChild(this.parentNode);
			this.parentNode.element.multi_selector.count--;
			this.parentNode.element.multi_selector.current_element.disabled = false;
			return false;
		};
		new_row.innerHTML = element.value.split('/')[element.value.split('/').length - 1];
		new_row.appendChild(new_row_button);
		this.list_target.appendChild(new_row);
	};
}