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

}


function swapLayer2(str1){

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

}
function swapLayerd(str1){

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

}

function swapLayer3(str2){

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

}