function switchvis(id,id2){ 
   if(document.getElementById(id,id2)){    
       var ele = document.getElementById(id);
	   var ele2 = document.getElementById(id2);    
       ele.style.display="block";
		   ele2.style.display="none";     
       
	}
}

function switchback(id,id2){ 
	if(document.getElementById(id,id2)){
   		var oele = document.getElementById(id);
		var oele2 = document.getElementById(id2);    
		oele.style.display="none";  
		oele2.style.display="block";      
   }
}

function clearall(item1,item2,item3,item4,item5,item6,item7){ 
	if(document.getElementById(item1,item2,item3,item4,item5,item6,item7)){
		var clearitem1 = document.getElementById(item1);
		var clearitem2 = document.getElementById(item2);
		var clearitem3 = document.getElementById(item3);
		var clearitem4 = document.getElementById(item4);
		var clearitem5 = document.getElementById(item5);
		var clearitem6 = document.getElementById(item6);
		var clearitem7 = document.getElementById(item7);
		clearitem1.style.display="none";
		clearitem1.style.display="none";
		clearitem2.style.display="none";
		clearitem3.style.display="none";
		clearitem4.style.display="none";
		clearitem5.style.display="none";
		clearitem6.style.display="none";
		clearitem7.style.display="none";
    
	}
}