//获取ID
function Y(al)
{
	    return eval('document.getElementById("'+al+'")');		
}


//改变样式
function ChangClass(uid,css,num)
{   
  var tabList = document.getElementById(uid).getElementsByTagName("li");
  
for(i=0; i<tabList.length; i++)
{
  if (i==num )
  { 

  tabList[i].className =css;
  document.getElementById("subNav"+i+"").style.display="block";

  }else{
      tabList[i].className ="none"; 
      document.getElementById("subNav"+i+"").style.display="none";

      }
} 

}


//改变div 
function ChangDiv(uid,css,num,div)
{  
  var tabList = document.getElementById(uid).getElementsByTagName("li");
for(i=0; i<tabList.length; i++)
{
  if (i ==num )
  { 

  tabList[i].className =css;

 document.getElementById(""+div+""+i+"").style.display="block";
    
  }else{

  tabList[i].className = "none"; 
 document.getElementById(""+div+""+i+"").style.display="none";
    }
} 

}


//改变图片 图片样式选项卡
function ChangImg(div,num)
{  
    for(i=2; i<=3; i++)
    {
          if (i ==num )
          { 
        	 document.getElementById(""+div+""+i+"").style.display="block";
			 document.getElementById("imgtab"+i).src="images/imgNavInd"+i+i+".jpg";
          }else{
         	document.getElementById(""+div+""+i+"").style.display="none";
			document.getElementById("imgtab"+i).src="images/imgNavInd"+i+".jpg";
			
         }
    } 
}