var tag=0;
function listCategory(){
        tag=arguments[0]||2;
		var pars = "rand="+Math.random();
		var iurl = "/xml/mainCategory.xml";
		doajax = new Ajax.Request(iurl,{method:'get',parameters:pars,onComplete:showsub});
}	
function showsub(doajax){
		rsp = doajax.responseXML.documentElement;
		//root = rsp.getElementsByTagName("rootCategory");
		rid = rsp.getElementsByTagName("second");
		$("rid").length=0;
		$("rid").options[0] = new Option("选择根类",0);
		var count=1;
		for(var i=0;i<rid.length;i++){
		      if( tag == rid[i].getAttribute("tag")){
				id = rid[i].getAttribute("id");
				name = rid[i].getAttribute("name");
				
				$("rid").options[count] = new Option(name,id);
				if(id == $F("rrid")) $("rid").options[count].selected = true;
				count++;
				}
		}
   shows(); 
}
function shows(){
       var id=$F('rid');
       var rcate = rsp.getElementsByTagName("second");
       for(var i=0;i<rcate.length;i++){
         var rid = rcate[i].getAttribute("id");
         if(rid == id){
            $("cid").length=0;
            var ccate = rcate[i].getElementsByTagName("third");
              if (ccate.length>0){
                for(var ci=0;ci<ccate.length;ci++){
                 cid = ccate[ci].getAttribute("id");
	             name = ccate[ci].getAttribute("name");
	             $("cid").options[ci] = new Option(name,cid);
	             if(cid == $F("rcid")) $("cid").options[ci].selected = true;
	              }
	             }else{
	             $("cid").length=0;
	             $("cid").options[0] = new Option("暂无分类",'0');
	              }
	              
	      }
	      
        }
}

function showimgCategory(){
	
		var pars = "rand="+Math.random();
		var iurl = "/xml/mainCategory.xml";
		doajax = new Ajax.Request(iurl,{method:'get',parameters:pars,onComplete:showPic});
}

function showPic(doajax){
	var rsp=doajax.responseXML.documentElement;
    var ccate = rsp.getElementsByTagName("third");
    if (ccate.length>0){
      var count = 1;
      var cid=0;
      var name='';
      for(var i=0;i<ccate.length;i++){
      	if(ccate[i].getAttribute("tag")!=3) continue;
        cid = ccate[i].getAttribute("id");
	    name = ccate[i].getAttribute("name");
	    $("ccid").options[count] = new Option(name,cid);
	    count++;
	  }
	}else{
	$("cd").length=0;
	$("cid").options[0] = new Option("暂无分类",'0');
	}
}

function checkSubForm(){
  if($F("rid") == 0){
  	alert("请选择分类");
  	return false;
  }else{
  	arguments[0].submit();
  }
  return true;
}
function checkSubForm3(){
  if($F('subject')==""){
  	alert("请填写标题");
  	$('subject').focus();
  	return false;
  }else{
  	arguments[0].submit();
  }
  return true;
}

function checkSubForm2(){
  if($F("rid") == 0){
  	alert("请选择分类");
  	return false;
  }else if($F('subject')==""){
  	alert("请填写标题");
  	$('subject').focus();
  	return false;
  }else{
  	arguments[0].submit();
  }
  return true;
}

function formsubmit(){
  if($F('ccid')!=0)
  $(arguments[0]).submit();	
}