var keyChar = ''; //在 Select Filed 中所輸入的字元
var mkey    = 1;  //計算連續輸入了幾次字元

function skey(vs)
	{
     var str  = ""; //存取目前Option的文字
     var i    = 0;  //Select Option 中總個有幾個 Items

	 keyChar += String.fromCharCode(event.keyCode);
	 keyChar = keyChar.toUpperCase(keyChar);

     while ( i < vs.length )
		{
		 str = vs.options[i].text;
		 str = str.toUpperCase(str);
		 if ( str.substring(0,mkey) == keyChar ) 
			{
				vs.options[i].selected = true;
				break;
			}

		 i++;
		}

	 mkey    += 1;
	 return;
	}//seky()

function clearKeyChar()
	{
	 keyChar = "";
	 mkey    = 1;
	}//clearKeyChar()