var mms_map_url = 'http://www.mymapspace.com/widget/map?';

if (typeof mms_map_width == "undefined") var mms_map_width = 250;
if (typeof mms_map_height == "undefined") var mms_map_width = 250;
if (typeof mms_map_type == "undefined") var mms_map_type = 'user';
if (typeof mms_map_id == "undefined") var mms_map_id = 0;

mms_map_uri('width',mms_map_width);
mms_map_uri('height',mms_map_height);
mms_map_uri('type',mms_map_type);
mms_map_uri('id',mms_map_id);

function mms_map_uri(key,val){mms_map_url+=('&'+key+'='+val);}

document.write('<ifr' + 'ame' + 
  ' id="mms_map_frame"' +
  ' height="' + mms_map_height + '"' +
  ' width="' + mms_map_width + '"' +
  ' frameborder="0"' +
  ' src="' + mms_map_url + '"' +
  ' marginwidth="0"' +
  ' marginheight="0"' +
  ' vspace="0"' +
  ' hspace="0"' +
  ' allowtransparency="true"' +
  ' scrolling="no">' + '</ifr' + 'ame>');