function search_btn(number){
	for(i=1;i<=3;i++){
		if(i==number){
			document.getElementById("search_btn"+number).className='search_hover';
			document.getElementById("search_form"+number).style.display='block';
		}else{
			document.getElementById("search_btn"+i).className="";
			document.getElementById("search_form"+i).style.display='none';
		}
	}
}