function hideObj(str)
{
	var obj = document.getElementById(str);
	obj.style.display = "none";	
}

function showObj(str,ppt)
{
	var obj = document.getElementById(str);
	obj.style.display = ppt;
}

function showOrHideObj(str,ppt)
{
	var obj = document.getElementById(str);
	if(obj.style.display==""){obj.style.display = "none";}
	if(obj.style.display != "none")
	{
		obj.style.display = "none";
	}
	else
	{
		obj.style.display = ppt;
	}
}

function clearText(obj,str)
{
	if(obj.value == str ||obj.innerHTML == str)
	{
		obj.value="";
		obj.style.color="#000000";
	}
}
function resetText(obj, str)
{
	if(obj.value == "" && obj.innerHTML =="")
	{
		obj.value=str;
		obj.style.color="#999999";
	}
}
//oObj 复选框，aim 目标对象ID，oStr原目标对象中的字符串，str新字符串，colorStr设置后目标内字体颜色
function setValue(oObj, aim, oStr, str, colorStr)
{
	var obj = document.getElementById(aim);
	if(oObj.checked)
	{
		
		if(obj.value == oStr)
		{
			obj.value = str;
			obj.style.color = colorStr;
		}
	}
	else
	{
		obj.value = oStr;
	}
}

function dropMenu(num, up, down, menu, con)
{
	var menuStr = menu + num;
	var conStr = con + num;
	var menuObj = document.getElementById(menuStr);
	var conObj = document.getElementById(conStr);
	
	if(menuObj.className == up){menuObj.className = down; conObj.style.display = "block";}
	else if(menuObj.className == down){menuObj.className = up; conObj.style.display = "none";}
}
//添加收藏
function addFav(describe, url)
{
   if (document.all)
   {
      window.external.addFavorite(url,describe);
   }
   else if (window.sidebar)
   {
      window.sidebar.addPanel(describe, url, "");
   }
}
//
function scaleImg(obj,th){
   
    var w = obj.width;
    var h = obj.height;
    var scale = w/h;        
        
  	var x = scale * th;
    
	if(x > 200)
	{
		obj.width = 200;
        obj.height = th;
		return;
	}else{
		obj.width = x;
		obj.height = th;
		return;
	}
}

function scaleImgW(obj,tw)
{
	var oW = tw;
    
    var width = obj.width;
    var height = obj.height;
    var scale = width/height;        
        
    var A = width/oW;
    
	if(A != 1)
	{
		obj.width = oW;
        obj.height = oW / scale;
		return;
	}
}

													/* >>> 3级下拉菜单 <<< */
					
					function initCate()
					{
						var cateObj = document.getElementById("classes");
						
						var level1 = cateObj.getElementsByTagName("H4");
						var level2 = cateObj.getElementsByTagName("H5");
						var level3 = cateObj.getElementsByTagName("H6");
						
						for(var i=0; i<level1.length; i++)
						{
							if (level1[i].addEventListener)
							{
								level1[i].addEventListener('click', showOrHideUL, false);
								level1[i].addEventListener('mouseover', colorBg, false);
								level1[i].addEventListener('mouseout', whiteBg, false);
							} else if (level1[i].attachEvent)
							{
								level1[i].attachEvent('onclick', showOrHideUL);
								level1[i].attachEvent('onmouseover', colorBg);
								level1[i].attachEvent('onmouseout', whiteBg);
							}
						}
						
						for(var i=0; i<level2.length; i++)
						{
							if (level2[i].addEventListener)
							{
								level2[i].addEventListener('click', showOrHideUL, false);
								level2[i].addEventListener('mouseover', colorBg, false);
								level2[i].addEventListener('mouseout', whiteBg, false);
							} else if (level2[i].attachEvent)
							{
								level2[i].attachEvent('onclick', showOrHideUL);
								level2[i].attachEvent('onmouseover', colorBg);
								level2[i].attachEvent('onmouseout', whiteBg);
							}
						}
					}
					
					function colorBg(e)
					{
						if(!e){e=window.event;}
						var eTarget = e.srcElement ? e.srcElement : e.target;
						
						eTarget.style.backgroundColor = "#eee";
					}
					
					function whiteBg(e)
					{
						if(!e){e=window.event;}
						var eTarget = e.srcElement ? e.srcElement : e.target;
						
						eTarget.style.backgroundColor = "#ffffff";
					}
					
					function showOrHideUL(e)
					{
						if(!e){e=window.event;}
						var eTarget = e.srcElement ? e.srcElement : e.target;
						//取得点击事件源
						if(eTarget.nextSibling)
						{
							var obj = eTarget.nextSibling;
							if(obj.tagName != 'UL'){obj = obj.nextSibling;}
						}else{return;}
						
						//换样式，显示或隐藏
						if(obj.style.display == "")
						{
							obj.style.display = "none"; 
							var len = eTarget.className.length - 1;
							eTarget.className = eTarget.className.substr(0,len);
							return;
						}
						
						if(obj.style.display == "none")
						{
							obj.style.display = "block"; 
							eTarget.className = eTarget.className + "2";
						}
						else if(obj.style.display == "block")
						{
							obj.style.display = "none";
							var len = eTarget.className.length - 1;
							eTarget.className = eTarget.className.substr(0,len);
						}
					}