var _typeID = 0;
var _numID = 0;
var _aType = ["a", "m", "w"];
var _aNum = [null, "x2", "x3", "2x", "3x"];
var _tagbase = '<script type="text/javascript" src="http://www.uniqlo.jp/blogparts/tag/tag.php?'

function changeTag(_btn){
	var _numTag = "";
	var _tar = document.getElementById('tag');
	var _t = _btn.id.charAt(0);
	if(_t == "t"){
		_typeID = _btn.value;
	}else{
		_numID = _btn.value;
	}
	_numTag = (_numID != 0)? '&arr=' + _aNum[_numID]: '';
	_tar.value = _tagbase + 'type=' + _aType[_typeID] + _numTag + '"></script>';
}