function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  }

  return null;
}

$(document).ready(
    function()
    {
        var query = getQueryVariable('postcode');
	var path = '';
	if( query != null )
	{
		path = '?search=' + query;
	}
	
	console.log(query);

	$("iframe").attr("src", $("iframe").attr("src") + path);
    }
)