var seid = "1";
function SetSearchBar(Nid){
	eval("document.getElementById('a"+seid+"').className='searchNoSelect'");  //导航
	eval("document.getElementById('a"+Nid+"').className='searchSelect'");
	eval("document.getElementById('k"+seid+"').style.display='none'");  //关键词
	eval("document.getElementById('k"+Nid+"').style.display=''");  //关键词
	var v = SearchForm.keywords.value;
	var Search_Direction = "";

	if(Nid=="1"){
		document.getElementById("btn").value ="搜索 驾校信息";
	    if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入您感兴趣的驾校名称！";
		document.getElementById("SearchForm_action").value = "http://jx.jiaxiao.com/index.aspx";
	}else if(Nid=="2"){
		document.getElementById("btn").value ="搜索 陪练信息";
		if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入您感兴趣的陪练名称！";
		document.getElementById("SearchForm_action").value = "http://peilian.jiaxiao.com/search.aspx";
	}else if(Nid=="3"){
		document.getElementById("btn").value ="搜索 资讯信息";
		if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入您感兴趣的资讯关键字！";
		document.getElementById("SearchForm_action").value = "http://news.jiaxiao.com/search.aspx";
	}else if(Nid=="4"){
		document.getElementById("btn").value ="搜索 考试信息";
		if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入考试试题关键词！";
		document.getElementById("SearchForm_action").value = "http://kaoshi.jiaxiao.com/index.aspx";
	}else if(Nid=="5"){
		document.getElementById("btn").value ="搜索 视频信息";
		if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入您感兴趣的视频关键词！";
		document.getElementById("SearchForm_action").value = "http://shipin.jiaxiao.com/index.aspx";
	}else if(Nid=="6"){
		document.getElementById("btn").value ="搜索 论坛信息";
		if(trim(v) == "" || v.substring(0,3) =="请输入")document.getElementById("keywords").value ="请输入论坛帖子关键词！";
		document.getElementById("SearchForm_action").value = "http://bbs.jiaxiao.com/index.aspx";
	}
	seid = Nid;
}

function doSearch() {
	var keywords = trim(document.SearchForm.keywords.value);
	var action_url = trim(document.SearchForm.SearchForm_action.value);

	if(keywords == "" || keywords.substring(0,3) =="请输入") {
		alert("提示：请输入关键词！");
		document.SearchForm.keywords.focus();
		return false;
	}
	if (keywords.length < 2) {
		alert("提示：关键词不能少于2个字符！");
		document.SearchForm.keywords.focus();        
		return false;
	}
	url = action_url + "?keywords=" + keywords;
	document.SearchForm.action = url;
	document.SearchForm.submit()
	return false;
}

function trim(inputString) {
	  if (typeof inputString != "string") { return inputString; }
	  var retValue = inputString;
	  var ch = retValue.substring(0, 1);
	  while (ch == " ") { 
	  //检查字符串开始部分的空格
		  retValue = retValue.substring(1, retValue.length);
		  ch = retValue.substring(0, 1);
	  }
	  ch = retValue.substring(retValue.length-1, retValue.length);
	  while (ch == " ") {
		 //检查字符串结束部分的空格
		 retValue = retValue.substring(0, retValue.length-1);
		 ch = retValue.substring(retValue.length-1, retValue.length);
	  }
	  while (retValue.indexOf("  ") != -1) { 
	 //将文字中间多个相连的空格变为一个空格
		 retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); 
	  }
	  return retValue;
   }