function citySearch(target_id){
var searchWord = document.getElementById(target_id).value;
	if(searchWord){
		if(searchWord != '市町村'){
			new $pop( '/special/mytown/city_search.php?text_freewd=' + encodeURI(searchWord) , { type: 'iframe', title: '', width: 440, height: 300} );
		}
	}
}