// 用于首页信息资料换页
function swapLayer1(str1){

	if(str1 == "a"){
		bgA_a.style.display = "block";
		bgA_b.style.display = "none";
		bgA_c.style.display = "none";
		
	}
	if(str1 == "b"){
		bgA_a.style.display = "none";
		bgA_b.style.display = "block";
		bgA_c.style.display = "none";
		
	}
	if(str1 == "c"){
		bgA_a.style.display = "none";
		bgA_b.style.display = "none";
		bgA_c.style.display = "block";
		
	}
	
}


function swapLayer2(str1){

	if(str1 == "a"){
		bgb_a.style.display = "block";
		bgb_b.style.display = "none";
	}
	if(str1 == "b"){
		bgb_a.style.display = "none";
		bgb_b.style.display = "block";
	}
	

}

function swapLayerd(str1){

	if(str1 == "a"){
		bgaa_a.style.display = "block";
		bgaa_b.style.display = "none";
		bgaa_c.style.display = "none";
		
	}
	if(str1 == "b"){
		bgaa_a.style.display = "none";
		bgaa_b.style.display = "block";
		bgaa_c.style.display = "none";
		
	}
	if(str1 == "c"){
		bgaa_a.style.display = "none";
		bgaa_b.style.display = "none";
		bgaa_c.style.display = "block";
		
	}
	

}

function swapLayer3(str2){

	if(str2 == "a"){
		bgc_a.style.display = "block";
		bgc_aa.style.display = "block";
		bgc_b.style.display = "none";
		bgc_bb.style.display = "none";
	}
	if(str2 == "b"){
		bgc_a.style.display = "none";
		bgc_aa.style.display = "none";
		bgc_b.style.display = "block";
		bgc_bb.style.display = "block";
	}

}

function swapLayer4(str1){

	if(str1 == "a"){
		bgbb_a.style.display = "block";
		bgbb_b.style.display = "none";
		bgbb_c.style.display = "none";
                bgbb_d.style.display = "none";
		
	}
	if(str1 == "b"){
		bgbb_a.style.display = "none";
		bgbb_b.style.display = "block";
		bgbb_c.style.display = "none";
                bgbb_d.style.display = "none";
		
	}
	if(str1 == "c"){
		bgbb_a.style.display = "none";
		bgbb_b.style.display = "none";
		bgbb_c.style.display = "block";
                bgbb_d.style.display = "none";
		
	}
	if(str1 == "d"){
		bgbb_a.style.display = "none";
		bgbb_b.style.display = "none";
		bgbb_c.style.display = "none";
                bgbb_d.style.display = "block";
		
	}

}