function $(element) {
	return document.getelementbyid(element);
}
//切屏--是按钮，_v是内容平台，_h是内容库
function reg(str){
  var bt=$(str+"_b").getelementsbytagname("h2");
  for(var i=0;i<bt.length;i++){
    bt[i].subj=str;
    bt[i].pai=i;
    bt[i].style.cursor="pointer";
    bt[i].onclick=function(){
      $(this.subj+"_v").innerhtml=$(this.subj+"_h").getelementsbytagname("blockquote")[this.pai].innerhtml;
      for(var j=0;j<$(this.subj+"_b").getelementsbytagname("h2").length;j++){
        var _bt=$(this.subj+"_b").getelementsbytagname("h2")[j];
        var ison=j==this.pai;
        _bt.classname=(ison?"":"h2bg");
      }
    }
  }
  $(str+"_h").classname="none";
  $(str+"_v").innerhtml=$(str+"_h").getelementsbytagname("blockquote")[0].innerhtml;
}


function picturs(){
	var goodsimg = document.getelementbyid("goodsimg");
	var imglist = document.getelementbyid("imglist");
	var imgnum = imglist.getelementsbytagname("img");
	for(var i = 0; i<imgnum.length; i++){
		imgnum[i].onclick=function(){
			var lang = this.getattribute("lang");
			goodsimg.setattribute("src",lang);
			for(var j=0; j<imgnum.length; j++){
				if(imgnum[j].getattribute("class") =="onbg" || imgnum[j].getattribute("classname") =="onbg"){
					imgnum[j].classname = "autobg";
					break;
				}
			}
			this.classname = "onbg";
		}
	}
}

function colorstyle(id,color1,color2){
  var elem = document.getelementbyid(id);
  if(elem.getattribute("id") == id){
	  //elem.classname = color1;
	  if(elem.classname == color1)
		   elem.classname = color2;
		else
		   elem.classname = color1; 
	}
}

function articlesize(size,lineheight){
var article = document.getelementbyid("article");
article.style.fontsize = size+"px";
article.style.lineheight = lineheight+"px";
}

function elems(id,cur){
var id = document.getelementbyid(id).getelementsbytagname("li");
for(var i=0; i<id.length; i++)
 {
	 id[0].classname = "cur";
   id[i].onmouseover = function()
   {
    this.classname="";
		for(var j=0; j<id.length; j++)
		{
			 if((id[j].getattribute("class") == cur) || (id[j].getattribute("classname") == cur))
			 {
			 id[j].classname = "";
			 break;
			 }
		}
	this.classname = cur;	
   }
 }
}

//点击切换背景图片效果

function mypicbg(){
	
	var imglist = document.getelementbyid("imglist");
	var imgnum = imglist.getelementsbytagname("img");
	for(var i = 0; i<imgnum.length; i++){
		imgnum[i].onclick=function(){
			
			for(var j=0; j<imgnum.length; j++){
				if(imgnum[j].getattribute("class") =="onbg" || imgnum[j].getattribute("classname") =="onbg"){
					imgnum[j].classname = "autobg";
					break;
				}
			}
			this.classname = "onbg";
		}
	}
}