/*
图片分类页
   shiwei2006 2007-10-12 10:36
*/

function $(id){return document.getElementById(id);}
function $n(n){return document.getElementsByName(n);}

var atb=['c1','c2','c3','c4'];
var atc=['con1','con2','con3','con4'];
var active=null;
var xc=null;
var mouseDelayTime=100;

function showModule(id){
	var l=window.event.srcElement;
	if(l==active)return;
  if(active){
  	active.style.removeAttribute('color');
  }
	active=l;
  var div=$('c'+id);
	var alink=div.children[0];
	if(alink){alink.style.color='#4A4A4A';alink.style.textDecoration='none';alink.blur();}
	div.className="active cPurple fB";//设置为当前活动
	xc=setTimeout(function(){setOtherButton(id);setOtherContent(id);},mouseDelayTime);
}

function setOtherButton(id){
	for(var i=0;i<atb.length;i++){
		if(atb[i]!='c'+id){
			$(atb[i]).className="normal";
		}
	}
	return;
}
function setOtherContent(id){
	for(var i=0;i<atc.length;i++){
		if(atc[i]!='con'+id){
			$(atc[i]).style.display="none";
		}else{
			$(atc[i]).style.display="";
		}
	}
	clearTimeout(xc);
	return;
}
//调用备用接口
function loadPage(){
	for(var i=0;i<atb.length;i++){
		if($(atb[i])){
		  with($(atb[i])){
         onclick = function(){
         	 if(!event.srcElement.href){
         	 	 children[0].onclick();
         	 }
        };
		  }
	 }
	}
}
window.onload=function(){
	loadPage();
        resizeLumpBox();
};

//调整活动元素的位置
function resizeLumpBox(){
	var lumpbox = $('lump_box');
	if(!lumpbox)return;
  var lis = lumpbox.getElementsByTagName('li');
  var active = null;
  for(var i=0,len = lis.length;i < len ;i++){
  	if(lis[i].className&&lis[i].className.indexOf('active')!=-1){
  		active = lis[i-1];
  		break;
  	}
  }
  if(!active)return;
  var y = getY(active,lumpbox);
  if(y > 468){
  	lumpbox.scrollTop = y;
  }
  return;
}

function getY(obj,pe){
	var ipy=obj.offsetTop;
	while(obj.offsetParent != pe){
		ipy+=obj.offsetTop-obj.scrollTop;
	}
	return ipy;
}