function MiniKB(datanode, dispnode) {
	this._dispnode = dispnode;
	this._datanode = datanode;
}

//MiniKB.NONE = "清除";
//MiniKB.BACK = "后退";
//MiniKB.OK = "确认";

MiniKB.prototype.onchange = function () {};

MiniKB.prototype.create = function ( doc, order ) {
	if ( doc == null ) doc = document;
	if ( order == null ) order = "0123456789";

	this._document = doc;
	this._order = order;
	
	// create elements
	this._el = doc.createElement( "div" );
	this._el.className = "minikb";
	
	var bodyTable = doc.createElement( "table" );
	this._el.appendChild( bodyTable );
	
	var tbody = doc.createElement( "tbody" );
	bodyTable.appendChild(tbody);
	
	var tr = doc.createElement( "tr" );
	tbody.appendChild(tr);
	
	var td = doc.createElement( "td" );
	this._button0 = doc.createElement("button");
	this._button0.className = "button" + order.charAt(0);
	this._button0.setAttribute("type", "button");
	td.appendChild(this._button0);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button1 = doc.createElement("button");
	this._button1.className = "button" + order.charAt(1);
	this._button1.setAttribute("type", "button");
	td.appendChild(this._button1);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button2 = doc.createElement("button");
	this._button2.className = "button" + order.charAt(2);
	this._button2.setAttribute("type", "button");
	td.appendChild(this._button2);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button3 = doc.createElement("button");
	this._button3.className = "button" + order.charAt(3);
	this._button3.setAttribute("type", "button");
	td.appendChild(this._button3);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button4 = doc.createElement("button");
	this._button4.className = "button" + order.charAt(4);
	this._button4.setAttribute("type", "button");
	td.appendChild(this._button4);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._backbutton = doc.createElement("button");
	this._backbutton.className = "backbutton";
	this._backbutton.setAttribute("type", "button");
	//this._backbutton.appendChild(doc.createTextNode(MiniKB.BACK));
	td.appendChild(this._backbutton);
	tr.appendChild(td);
	
	var tr = doc.createElement( "tr" );
	tbody.appendChild(tr);
	
	var td = doc.createElement( "td" );
	this._button5 = doc.createElement("button");
	this._button5.className = "button" + order.charAt(5);
	this._button5.setAttribute("type", "button");
	td.appendChild(this._button5);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button6 = doc.createElement("button");
	this._button6.className = "button" + order.charAt(6);
	this._button6.setAttribute("type", "button");
	td.appendChild(this._button6);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button7 = doc.createElement("button");
	this._button7.className = "button" + order.charAt(7);
	this._button7.setAttribute("type", "button");
	td.appendChild(this._button7);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button8 = doc.createElement("button");
	this._button8.className = "button" + order.charAt(8);
	this._button8.setAttribute("type", "button");
	td.appendChild(this._button8);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._button9 = doc.createElement("button");
	this._button9.className = "button" + order.charAt(9);
	this._button9.setAttribute("type", "button");
	td.appendChild(this._button9);
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._clearbutton = doc.createElement("button");
	this._clearbutton.className = "clearbutton";
	this._clearbutton.setAttribute("type", "button");
	//this._clearbutton.appendChild(doc.createTextNode(MiniKB.NONE));
	td.appendChild(this._clearbutton);
	tr.appendChild(td);
	
	var tr = doc.createElement( "tr" );
	tbody.appendChild(tr);
	
	td = doc.createElement( "td" );
	td.colSpan = 5;
	td.className = "filler";
	td.appendChild( doc.createTextNode( String.fromCharCode( 160 ) ) );
	tr.appendChild(td);
	
	var td = doc.createElement( "td" );
	this._okbutton = doc.createElement("button");
	this._okbutton.className = "okbutton";
	this._okbutton.setAttribute("type", "button");
	//this._okbutton.appendChild(doc.createTextNode(MiniKB.OK));
	td.appendChild(this._okbutton);
	tr.appendChild(td);
	
	// IE55+ extension
	this._backbutton.hideFocus = true;
	this._clearbutton.hideFocus = true;
	// end IE55+ extension
	
	// hook event
	var kb = this;
	this._button0.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(0));
	};
	
	this._button1.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(1));
	};
	
	this._button2.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(2));
	};
	
	this._button3.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(3));
	};
	
	this._button4.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(4));
	};
	
	this._button5.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(5));
	};
	
	this._button6.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(6));
	};
	
	this._button7.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(7));
	};
	
	this._button8.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(8));
	};
	
	this._button9.onclick = function () {
		kb.setData(kb.getData() + kb._order.charAt(9));
	};
	
	this._backbutton.onclick = function () {
		if (kb.getData().length == 0) return;
		kb.setData(kb.getData().substring(0, kb.getData().length - 1));
	};
	
	this._clearbutton.onclick = function () {
		if (kb.getData().length == 0) return;
		kb.setData("");
	};
	
	this._okbutton.onclick = function () {
		kb.close();
	};
	
	return this._el;
}

MiniKB.prototype.setData = function ( data ) {
	// need for ie
	if (this._datanode.maxLength > 0 && data.length > this._datanode.maxLength) return; 

	this._datanode.value = data;
}

MiniKB.prototype.getData = function ( ) {
	return this._datanode.value;
}

MiniKB.prototype.close = function ( doc ) {
	this._dispnode.removeChild(this._el);
}

function ToggleMiniKB(datanode, dispnode, order) {
  if (dispnode.hasChildNodes()) {
  	dispnode.removeChild(dispnode.childNodes[0]);
  }else{
  	var kb = new MiniKB(datanode, dispnode);
  	dispnode.appendChild(kb.create(null, order));
  }
}