tip = "ÇëÊäÈëËÑË÷¹Ø¼ü×Ö";
function hidetip()
{
	document.getElementById("q").style.color = "#FF6600";
	if (tip == document.getElementById("q").value)
		document.getElementById("q").value = "";	
}

function showtip()
{
	if ("" == document.getElementById("q").value)
	{
		document.getElementById("q").style.color = "#FF6600";
		document.getElementById("q").value = tip;	
	}
}