function show_purpose(obj){
	document.getElementById('search_purpose').style.display =''
	document.getElementById('search_category').style.display ='none'
	document.getElementById('search_list').style.display ='none'
	document.getElementById('search_tiku').style.display ='none'
	if(document.getElementById('selected')){
		document.getElementById('selected').id =''
	}
	obj.id ='selected'
}
function show_category(obj){
	document.getElementById('search_purpose').style.display ='none'
	document.getElementById('search_category').style.display =''
	document.getElementById('search_list').style.display ='none'
	document.getElementById('search_tiku').style.display ='none'
	if(document.getElementById('selected')){
		document.getElementById('selected').id =''
	}
	obj.id ='selected'
}
function show_list(obj){
	document.getElementById('search_purpose').style.display ='none'
	document.getElementById('search_category').style.display ='none'
	document.getElementById('search_list').style.display =''
	document.getElementById('search_tiku').style.display ='none'
	if(document.getElementById('selected')){
		document.getElementById('selected').id =''
	}
	obj.id ='selected'
}
function show_tiku(obj){
	document.getElementById('search_purpose').style.display ='none'
	document.getElementById('search_category').style.display ='none'
	document.getElementById('search_list').style.display ='none'
	document.getElementById('search_tiku').style.display =''
	if(document.getElementById('selected')){
		document.getElementById('selected').id =''
	}
	obj.id ='selected'
}