function AddressSelector( id , url ) {
	if( !id ) return;
	this.id = id;

	this.panel = document.getElementById( id );
	if( !this.panel ) return;

	var ipts = this.panel.getElementsByTagName( 'input' );
	for( var i = 0 ; i < ipts.length ; i++ ) {
		if( ipts[ i ].getAttribute( 'name' ) == 'location' ) {
			this.dest = ipts[ i ];
		}
	}
	if( !this.dest ) {
		this.dest = document.createElement( 'input' );
		this.dest.type = 'hidden';
		this.dest.name = 'location';
		this.dest.value = '';
		this.panel.appendChild( this.dest );
	}
	else {
		if( this.dest.value ) {
			var value = this.dest.value.split( '/' );
			this.value1 = value[ 0 ];
			this.value2 = value[ 1 ];
		}
	}

	this.url = url;

	this.request = null;

	try {
		this.request = new XMLHttpRequest();
		if( !this.request ) throw false;
	}
	catch( e ) {
		this.request = new ActiveXObject( 'Msxml2.XMLHTTP' );
		if( !this.request ) this.request = new ActiveXObject( 'Microsoft.XMLHTTP' );
	}

	this.target1 = document.getElementById( 'sido' );
	this.addEvent( this.target1 , 'change' , this.getGugun );
	this.addEvent( this.target1 , 'change' , this.setValue );

	this.target2 = document.getElementById( 'gugun' );
	this.addEvent( this.target2 , 'change' , this.setValue );

	this.getSido();
}

AddressSelector.prototype.setValue = function () {
	if( !this.dest ) return;

	var adr = '';
	this.dest.value = adr;

	if( this.target1 ) adr = this.target1.value
	if( this.target1.value && this.target2 ) if( this.target2.value ) adr += '/' + this.target2.value

	this.dest.value = adr;
}

AddressSelector.prototype.getSido = function() {
	this.request.open( "GET" , this.url , true );
	this.request.onreadystatechange = this.binding( this.setSido );
	this.request.send(null);
}

AddressSelector.prototype.getGugun = function() {
	for( var i = ( this.target2.options.length -1 ) ; i >= 1 ; i-- ) {
		this.target2.removeChild( this.target2.options[ i ] );
	}

	if( !this.target1.value ) return;

	var params = 'sido=' +  encodeURIComponent( this.target1.value );

	this.request.open( "GET" , this.url + '?' + params , true );
	this.request.onreadystatechange = this.binding( this.setGugun );
	this.request.send(null);
}

AddressSelector.prototype.setSido = function() {
	if( ( this.request.readyState == 4 ) && ( this.request.status == 200 ) ) {

		var txt = this.request.responseText;
		if( !txt ) return;

		var returns = txt.split( "\n" );

		for( var i = 0 , d = null , n = null ; i < returns.length ; i++ ) {
			d = returns[ i ];
			if( !d ) continue;

			var opt = document.createElement( 'option' );
			opt.value = d;
			if( this.value1 == d ) {
				opt.selected = true;
				this.value1 = null;
			}
			opt.appendChild( document.createTextNode( d ) );
			this.target1.appendChild( opt );
		}

		if( this.value2 ) this.getGugun();
	}
}

AddressSelector.prototype.setGugun = function() {
	if( ( this.request.readyState == 4 ) && ( this.request.status == 200 ) ) {

		var txt = this.request.responseText;
		if( !txt ) return;

		var returns = txt.split( "\n" );

		for( var i = 0 , d = null , n = null ; i < returns.length ; i++ ) {
			d = returns[ i ];
			if( !d ) continue;

			var opt = document.createElement( 'option' );
			opt.value = d;
			if( this.value2 == d ) {
				opt.selected = true;
				this.value2 = null;
			}
			opt.appendChild( document.createTextNode( d ) );
			this.target2.appendChild( opt );
		}
	}
}

AddressSelector.prototype.binding = function() {
	for(  var i = 0 , args = [] ; i < arguments.length ; i++ ) args.push( arguments[ i ] );

	if( args.length < 1 ) return undefined;

	var func = args.shift();
	var thisObj = this;
	if( typeof( func ) != 'function' ) return undefined;

	return function() {
		return func.apply( thisObj , args );
	};
}

AddressSelector.prototype.bindEvent = function() {
	for(  var i = 0 , args = [] ; i < arguments.length ; i++ ) args.push( arguments[ i ] );

	if( args.length < 1 ) return undefined;

	var func = args.shift();
	var thisObj = this;
	if( typeof( func ) != 'function' ) return undefined;

	return function() {
		var evt = ( ( arguments.length > 0 ) ? arguments[0] : window.event );
		return func.apply( thisObj , [ evt ].concat( args ) );
	};
}


AddressSelector.prototype.addEvent = function( src , evtType , func , args ) {
	if( src.attachEvent ) {
		src.attachEvent( 'on' + evtType , this.bindEvent( func , args ) );
	}
	else {
		src.addEventListener( evtType , this.bindEvent( func , args ) , false );
	}
}