var searchItem=[{title:"知识",channel:'goqw.jsp',enbutton:true,advsearch:[],radios:[]},
				{title:"图书",channel:'search',enbutton:true,advsearch:[{title:"中文高级检索",href:"http://"+_bookDomain+"/jsarea.jsp?channel=bookadv"}],radios:[{title:"全部字段",value:"all"},{title:"书名",value:"1"},{title:"作者",value:"2"}]},
				{title:"期刊",channel:'searchJour',enbutton:true,advsearch:[{title:"中文高级检索",href:"http://"+_bookDomain+"/jsarea.jsp?channel=jouradv"},{title:"外文高级检索",href:"http://"+_bookDomain+"/jsarea.jsp?channel=fjouradv"}],radios:[{title:"全部字段",value:"all"},{title:"标题",value:"1"},{title:"作者",value:"2"},{title:"刊名",value:"3"},{title:"关键词",value:"4"}]},
				{title:"报纸",channel:'searchNP',enbutton:false,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"标题",value:"1"},{title:"作者",value:"2"},{title:"来源",value:"3"}]},
				{title:"学位论文",channel:'searchThesis',enbutton:true,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"标题",value:"1"},{title:"作者",value:"2"},{title:"授予单位",value:"4"},{title:"关键词",value:"3"}]},
				{title:"会议论文",channel:'searchCP',enbutton:true,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"标题",value:"1"},{title:"作者",value:"2"},{title:"关键词",value:"3"},{title:"会议名称",value:"4"}]},
				{title:"专利",channel:'searchPatent',enbutton:true,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"专利名称",value:"2"},{title:"申请号",value:"1"},{title:"发明人",value:"3"},{title:"IPC号",value:"4"}]},
				{title:"标准",channel:'searchStd',enbutton:true,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"标准号",value:"1"},{title:"标准中文名",value:"2"},{title:"标准英文名",value:"3"}]},
				{title:"视频",channel:'searchVideo',enbutton:false,advsearch:[],radios:[{title:"全部字段",value:"all"},{title:"视频名称",value:"1"},{title:"主讲人",value:"2"},{title:"字幕",value:"3"}]}
				];
//最后一次点击频道的索引号
var lastItemId=0;

function isSearch(obj) {
	var __patrn__ = /\||\!|@|#|\$|%|\^|&|\*|\(|\)|_|\+|\-|}|{|\/|\.|,|\?|>|<|~|、|】|【|‘|；|’|、|。|，|￥|……|）|（|！/gi;
	var s=g("sw").value.trim();
	return s.replace(__patrn__,"")!='';
}

function creatTopMenu(){
	var html=["<ul>"];
	for(var i=0;i<searchItem.length;i++){
		html.push('<li id="menu_'+i+'_0" style="display:'+((i==0&&searchItem[i].channel!='goqw.jsp')?'':'none')+';font-weight: bold;"><a><font  color="#000000">'+searchItem[i].title+'</font></a></li>');
		html.push('<li id="menu_'+i+'_1" style="display:'+((i!=0&&searchItem[i].channel!='goqw.jsp')?'':'none')+';"><a href="javascript:changeTopMenu('+i+')">'+searchItem[i].title+'</a></li>');
		
		if(i==0){
			setEnButton(i);
			setAdvSearch(i);
			setRadios(i);
			setChannel(i);
		}
	}
	html.push("</ul>");
	var top_menu=g("top_menu");
	top_menu.innerHTML=html.join('');
}

//外文搜索按钮是否可用
function setEnButton(itemIndex){
	if(searchItem[itemIndex].enbutton){
		g("fsearch").disabled=false;
	}else{
		g("fsearch").disabled=true;
	}
}

//显示高级检索链接
function setAdvSearch(itemIndex){
	g("book_right3").innerHTML="";
	if(searchItem[itemIndex].advsearch.length>0){
		var html=[];
		var advsearchs=searchItem[itemIndex].advsearch;
		for(var i=0;i<advsearchs.length;i++){
			html.push('<a href="'+advsearchs[i].href+'">'+advsearchs[i].title+'</a>');
		}
		g("book_right3").innerHTML=html.join('');
	}
}

//显示检索单选字段按钮
function setRadios(itemIndex){
	g("book").innerHTML="";
	if(searchItem[itemIndex].radios.length>0){
		var radios=searchItem[itemIndex].radios;
		var html=[];
		for(var i=0;i<radios.length;i++){
			html.push('<input id="slt'+i+'" type="radio" '+(i==0?'checked':'')+' value="'+radios[i].value+'" name="Field"><label for="slt'+i+'">'+radios[i].title+'</label>');
		}
		g("book").innerHTML=html.join('');
	}
}

function setChannel(itemIndex){
	g("channel").value=searchItem[itemIndex].channel;
}

//检索频道链接切换
function changeItem(itemIndex){
	g("menu_"+lastItemId+"_0").style.display = 'none';
	g("menu_"+lastItemId+"_1").style.display = (searchItem[lastItemId].channel!='goqw.jsp')?'':'none';

	g("menu_"+itemIndex+"_0").style.display = (searchItem[itemIndex].channel!='goqw.jsp')?'':'none';
	g("menu_"+itemIndex+"_1").style.display = 'none';
}

//频道切换
function changeTopMenu(itemIndex){
	changeItem(itemIndex);
	
	setEnButton(itemIndex);
	setAdvSearch(itemIndex);
	setRadios(itemIndex);
	setChannel(itemIndex);
	
	lastItemId=itemIndex;
}

function findexsearch(){
	if(g("channel").value=="search" || g("channel").value=="goqw.jsp" || g("channel").value=="searchJour" || g("channel").value=="searchStd" || g("channel").value=="searchCP" || g("channel").value=="searchPatent" || g("channel").value=="searchThesis"){
		if(g("channel").value=="goqw.jsp"){
			g("channel").value="searchFJour";
		}else if(g("channel").value=="search"){
			g("channel").value="searchFBook";
		}else{
			var channelVal=g("channel").value;
			g("channel").value="searchF"+channelVal.replaceAll("search","");
		}
		if(g("sw").value!="")
			g("f2").submit();
	}
}

creatTopMenu();