//显示隐藏层
function chg(id_num){
	 var oa = document.getElementById(id_num);
	 var ob = document.getElementById("click");
	 if(oa.style.display == "block"){
			 oa.style.display = "none";
	 }
	 else{
			 oa.style.display = "block";
	 }
	 return false;
}

function chg1(id_num1,id_num2){
	 var oa1 = document.getElementById(id_num1);
	 var oa2 = document.getElementById(id_num2);
	 var ob = document.getElementById("click");
	 if(oa1.style.display == "block"){
			 oa1.style.display = "none";
			 oa2.style.display = "block";
	 }
	 else{
			 oa1.style.display = "block";
			 oa2.style.display = "none";
	 }
	 return false;
}

function chg_all_s(str,num){
	 for (var i = 1; i <= num; i++) {
		 var oa = document.getElementById(str+i);
		 var ob = document.getElementById("click");
		 oa.style.display = "block";
	 }
	 return false;
}

function chg_all_h(str,num){
	 for (var i = 1; i <= num; i++) {
		 var oa = document.getElementById(str+i);
		 var ob = document.getElementById("click");
		 oa.style.display = "none";
	 }
	 return false;
}

function chg_all_ps(str,num,show){
	 for (var i = 1; i <= num; i++) {
		 var oa = document.getElementById(str+i);
		 var ob = document.getElementById("click");
		 oa.style.display = "none";
	 }
	 var oc = document.getElementById(show);
	 oc.style.display = "";
	 return false;
}