function change(i){
obj="div_s"+i
obj_text="s_text"+i
obj_ej="ej"+i
	if(i>1){
		obj_text_front="s_text"+(i-1)
		div_obj_text_fornt=document.getElementById(obj_text_front)
		div_obj_text_fornt.className="s_text_nb"
		div_obj=document.getElementById(obj)
		div_obj_text=document.getElementById(obj_text)
		div_obj_ej=document.getElementById(obj_ej)
		div_obj.className="div_b";
		div_obj_text.className="s_text_other"
		div_obj_ej.style.display="block"
		if(i==3){	
			div_obj_ej.className="div_ej2";
		}
		if(i==4){	
			div_obj_ej.className="div_ej3";
		}
		if(i==5){	
			div_obj_ej.className="div_ej4";
		}
		if(i==6){	
			div_obj_ej.className="div_ej5";
		}
		
		if(i==7){	
			div_obj_ej.className="div_ej6";
		}
	}
}

function change2(i){
obj="div_s"+i
obj_text="s_text"+i
obj_ej="ej"+i
if(i>1)
{
obj_text_front="s_text"+(i-1)
div_obj_text_fornt=document.getElementById(obj_text_front)
div_obj_text_fornt.className="s_text"
}
div_obj=document.getElementById(obj)
div_obj_text=document.getElementById(obj_text)
div_obj_ej=document.getElementById(obj_ej)
div_obj.className="div_s";
if(i<7){
div_obj_text.className="s_text"
}
if(i==7){
div_obj_text.className="s_text_nb"
}
div_obj_ej.style.display="none"
}