// -------------------------
// 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.title = 'Remove This Image';
		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);
	};
}