function $(_id) {return document.getElementById(_id)}
function changesearch(frm)
{
	var menuid=frm.selectedIndex;
	$("c2").options.length=0;
	if(frm.options[menuid].value!="")
	{
		if(frm.options[menuid].value == "book")
		{
			$("c2").options.add(new Option("书名", "bookname"));
			$("c2").options.add(new Option("作者", "author"));
			$("c2").options.add(new Option("ISBN", "isbn"));
			$("c2").options.add(new Option("出版日期", "pubdate"));
			$("c2").options.add(new Option("责编", "editor"));
			$("c2").options.add(new Option("模糊查询", "more"));
		}
		else if(frm.options[menuid].value == "news")
		{
			$("c2").options.add(new Option("标题", "title"));
			$("c2").options.add(new Option("内容", "content"));
		}
		else
		{
			//
		}
	}
}
function jump_flink(frm)
{
	var menuid=frm.selectedIndex;
	if(frm.options[menuid].value!="")
	{
		window.open(frm.options[menuid].value);
		return true;
	}
}

function CheckSearch(frm)
{
	if(frm.keyword.value == "请您输入查询内容")
	{
		alert("请输入查询关键字！");
		frm.keyword.value="";
		frm.keyword.focus();
		return false;
	}
	//frm.target = "_blank";
	switch(frm.c1.value)
	{
		case "book":
			frm.action = "/book/search.php";
			break;
		case "news":
			frm.action = "/news/search.php";
			break;
	}

	return true;
}