function task(id){
    var f = document.getElementById(id);     
    if (f.style.display==''||f.style.display=='none'){      	
        f.style.display = 'block';
    } 
   }
   function task_hidden(div){
   var h = document.getElementById(div);
   if (h.style.display=='block'){
    	h.style.display = 'none';
	}
   
   }
   
  function checkapply(){
	var mission_title = document.getElementById('mission_title').value;
	mission_title=mission_title.replace(/(^\s*)|(\s*$)/g, "");
	if(mission_title.length<=0){
		alert("任务名不能为空");
		//document.messionsearchform.onsubmit= function(){return false};
		return false;
	}
	else if(mission_title.indexOf("&")!=-1||mission_title.indexOf("_")!=-1||mission_title.indexOf("|")!=-1||mission_title.indexOf("/")!=-1||mission_title.indexOf("%")!=-1||mission_title.indexOf("+")!=-1)
	{
		alert("标题中不能含有&,_,|,/,%,+等特殊字符！");
		//document.messionsearchform.onsubmit= function(){return false};
		return false;
	} else{
    //document.messionsearchform.onsubmit= function(){return true};
    //document.messionsearchform.submit();
    window.location="http://task.hudong.com/entermission.wiki?mission_title="+encodeURIComponent(mission_title);
    return false;
   }
}

String.prototype.trim = function() {
	return this.replace(/^\s*|\s*$/g,"");
};

 function show(obj,current,showid){
  	var cat =  document.getElementsByName('cat');
  	for(var i=0;i<cat.length;i++){
  		cat[i].id='';
  		cat[i].setAttribute("class","");
      cat[i].setAttribute("className","");
  		}
	   	obj.id = current; 
		var t = document.getElementById(showid)
		if (upt.style.display==''||upt.style.display=='block'){
			upt.style.display="none";
			upt = t;				
			}
   		t.style.display = "block";
   		upt = t; 
  }
    function del(obj){
  	obj.id = '';
  }

  var upt=document.getElementById('hot');