var kb_status = '1';
var kb_readStr = '';
var kb_isstart = false;
var kb_readfunc = '';
function start_read(func) {
	kb_isstart = true;
	kb_readfunc = func;
	kb_status = '1';
	kb_readStr = '';
}
function stop_read() {
	kb_isstart = false;
	kb_readfunc = '';
}
function fromKeyCode(code) {
	if((code >= 48 && code <= 57) || (code >= 65 && code <= 90)) return String.fromCharCode(code);
	var keys = {186: ';', 188: ',', 189: '-', 190: '.', 191: '/', 222: "'", 219: '[', 221: ']', 187: '=',
	96:'Num 0', 97:'Num 1', 98:'Num 2', 99:'Num 3', 100:'Num 4', 101:'Num 5', 102:'Num 6', 103:'Num 7', 104:'Num 8', 105:'Num 9', 
	111:'Num /', 106:'Num *', 109:'Num -', 111:'Num /', 107:'Num +',13:'[enter]',8:'[back]',110:'Num .'
	};
	if(keys[code]) return keys[code];
	return '*err*';
}
function hashCode(strKey)   
{   
	var hash = 0;   
	if(strKey != null && strKey != "")   
	{   
		for (var i = 0; i < strKey.length; i++)   
		{   
			hash = hash * 31 + strKey.charCodeAt(i);   
			hash = intValue(hash);
		}   
	}   
	return hash;   
}   
  
function intValue(num)   
{   
	var MAX_VALUE = 0x7fffffff;   
	var MIN_VALUE = -0x80000000;   
	if(num > MAX_VALUE || num < MIN_VALUE)   
	{   
		return num &= 0xFFFFFFFF;   
	}   
	return num;   
} 
document.onkeydown = function() {
	if(!kb_isstart) return ;
	var code = event.keyCode; 
	//[st]sduf87fjsdfysd78,526976123;
	if(code == 16) return ;
	kb_dealKey(fromKeyCode(code));
}


function kb_dealKey(c) {

	if(kb_status == '1') { //开始
		if(c == '[') {
			kb_status = '2';
		} else if(c == ';') { //IC卡
			kb_status = '6';
		}
		else kb_readErr( 2);
	} else if(kb_status == '2') { //读取s
		if(c == 'S') kb_status = '3';
		else { 
			kb_status = '1';
			kb_readErr(3);
		}
	} else if(kb_status == '3') { //读取t
		if(c == 'T') kb_status = '4';
		else { 
			kb_status = '1';
			kb_readErr(4);
		}
	} else if(kb_status == '4') { //读取]
		if(c == ']') {
			kb_status = '5';
			kb_readStr = '';
		} else { 
			kb_status = '1';
			kb_readErr(5);
		}
	} else if(kb_status == '5') { //读取内容
		if(c == ';') {
			kb_status = '1';
			var a = kb_readStr.split(",");
			if(a.length == 2) {
				var s1 = a[0].toLowerCase();
				var hcode = a[1];
				if(hashCode(s1) == hcode) {
					kb_readContent(s1, 'qr');
				} else {
					//alert(s1+","+hcode+","+hashCode(s1));
					kb_readErr(6);
				}
			} else {
				kb_readErr(7);
			}
			
			kb_readStr = '';
		} else {
			if(c == '*err*') {
				kb_status = '1';
				kb_readErr(8);
			} else {
				kb_readStr += c;
			}
		}
	} else if(kb_status == '6') { //IC卡读取内容
		if(c == '/') {
			kb_status = '1';
			
			var s1 = kb_readStr.toLowerCase();
			kb_readContent(s1, 'ic');
			
			kb_readStr = '';
		} else {
			if(c >= '0' && c <= '9') {
				kb_readStr += c;
			} else {
				kb_status = '1';
				kb_readErr(8, 'ic');
			}
		}
	}
	//$("div1").innerHTML += kb_status+"<br />";
}
function kb_readErr(rs, type) {
	kb_status = '1';
	kb_readStr = '';

	//alert(from+":读取错误！"+rs);
	var tname = '二维码';
	if(type && type == 'ic') {
		tname = 'IC卡';
	}

}
function kb_readContent(str, type) {
	if(!kb_isstart) return ;
	try{kb_readfunc(type, str);} catch(e){}
}