function goPage( page ) {
	var url = location.href;
	var pos = url.lastIndexOf( '?' );
	if( pos > 0 ) {
		url = url.substr( 0, pos );
	}
	
	pos = url.indexOf( "~page=" );
	if( pos < 0 ) {
		pos = url.length;
	}

	var end = url.indexOf( "~", pos + 1 );
	if( end < 0 ) {
		end = url.length;
	}

	url = url.substr( 0, pos ) + "~page=" + page + url.substr( end );
	location.href = url;
}