function checkLogin(n) {
	var keyword = document.getElementById("keyword")
	if (n == 0 && keyword.value == "输入关键词"){keyword.value="";keyword.style.cssText = "color:#000"}
	if (n == 1 && keyword.value == ""){keyword.value = "输入关键词";keyword.style.cssText = "color:#aaa"}
}
function checksearchform()
{ var keyword = document.getElementById("keyword").value; 
if (keyword.length<2) 
{ alert('请填写关键词!且不少于两个字符');	
 document.getElementById("keyword").focus(); return false; } 
return true; }