function abcd(j)//主页关注本站企业会员
{
	for(var i=1;i<=3;i++)
	{
		document.getElementById("zbt"+i).className="blacka1"; 
		document.getElementById("tab"+i).style.display="none";
	}	
	
	document.getElementById("zbt"+j).className="blacka2";
	document.getElementById("tab"+j).style.display="";

}

function ltrt(j)//主页论坛热贴
{
	for(var i=1;i<=2;i++)
	{
		document.getElementById("ltr"+i).className="blacka1"; 
		document.getElementById("ltrt"+i).style.display="none";
	}	
	
	document.getElementById("ltr"+j).className="blacka2";
	document.getElementById("ltrt"+j).style.display="";

}



 function xxzx(j)//信息中心
{
	for(var i=1;i<=2;i++)
	{
		document.getElementById("xxz"+i).className="xxzx1"; 
		document.getElementById("xxzx"+i).style.display="none";
	}	
	
	document.getElementById("xxz"+j).className="xxzx2";
	document.getElementById("xxzx"+j).style.display="";

}
 
 

function gjgal(j)//钢结构工程案例
{
	for(var i=1;i<=2;i++)
	{
		document.getElementById("gjga"+i).className="gjgal1"; 
		document.getElementById("gjgall"+i).style.display="none";
	}	
	
	document.getElementById("gjga"+j).className="gjgal2";
	document.getElementById("gjgall"+j).style.display="";

}

 
function Fabcd(j)//分站主页关注企业会员
{
	for(var i=1;i<=3;i++)
	{
		document.getElementById("zbt"+i).className="blackb1"; 
		document.getElementById("tab"+i).style.display="none";
	}	
	
	document.getElementById("zbt"+j).className="blackb2";
	document.getElementById("tab"+j).style.display="";
}
 
 
function Fdwxx(j)//分站施工单位 设计单位 原材单位
{
	for(var i=1;i<=3;i++)
	{
		document.getElementById("Fdwx"+i).className="Fdwxx1"; 
		document.getElementById("Fdwxx"+i).style.display="none";
	}	
	
	document.getElementById("Fdwx"+j).className="Fdwxx2";
	document.getElementById("Fdwxx"+j).style.display="";

} 

function Fylxx(j)//分站风采展示
{
	for(var i=1;i<=2;i++)
	{
		document.getElementById("Fylx"+i).className="blacka1"; 
		document.getElementById("Fylxx"+i).style.display="none";
	}	
	
	document.getElementById("Fylx"+j).className="blacka2";
	document.getElementById("Fylxx"+j).style.display="";

}
 
 

 
 var arr_1= new Array("s1","s2","s3","s4","s5","s6");  //li_cur3 正常    li_nor3  check 
var arr_2= new Array("s1_cont","s2_cont","s3_cont","s4_cont","s5_cont","s6_cont");

function change_bg(num)
{
var no_check_left='li_cur4';
var non_check_right='li_cur3';
var check_left='li_nor3';
var check_right='li_nor4';
	 
	for(var i=0;i<arr_1.length;i++)
	{
		if( (i+1)%2==0 )
	    document.getElementById(arr_1[i]).className=non_check_right;
		else
	     document.getElementById(arr_1[i]).className=no_check_left;
 		 document.getElementById(arr_2[i]).style.display='none';
 	}
	
	if( (num)%2==0 )
	 document.getElementById(arr_1[num-1]).className=check_right;
	 else
	 document.getElementById(arr_1[num-1]).className=check_left;
	 
	 
 	  document.getElementById(arr_2[num-1]).style.display='block';
}





function sousuo(j)
{
        
	for(var i=1;i<=3;i++)
	{
		document.getElementById("sousuo"+i).className="wenzi2"; 
		document.getElementById("sousuos"+i).style.display="none";
		//alert(document.getElementById("sousuo"+i).className);
	}	
	
	document.getElementById("sousuo"+j).className="wenzi1";
	document.getElementById("sousuos"+j).style.display="";

}