var latlng = new google.maps.LatLng(39.799832,-76.990557);
var myOptions = {
  zoom: 13,
  center: latlng,
  mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var marker = new google.maps.Marker({
	  position: latlng, 
	  map: map, 
	  title:"Riley Welding and Fabricating, Inc."
});   	

var dwToString ='<div style="text-align:left; font-size:12px">'+
	'<h3 style="margin:0px; padding:0px;">Address:</h3>'+
	'<p style="margin:0px; padding:0px;"><a href="http://maps.google.com/maps?f=q&amp;source=s_q&amp;hl=en&amp;geocode=&amp;q=234+poplar+street,+Hanover+PA+17331&amp;sll=37.0625,-95.677068&amp;sspn=49.223579,79.013672&amp;ie=UTF8&amp;view=map">234 Poplar St<br />'+
	'Hanover, PA 17331</a></p>'+
	'<br/>Get Directions: <b>To here<\/b> - <a href="javascript:dwOpenFrom();">From here<\/a>' +
			   '<br><br>Start address:<form action="http://maps.google.com/maps" method="get" target="_blank">' +
			   '<input type="text" SIZE=25 name="saddr" id="saddr" value="" />' +
			   '<INPUT value="Go" TYPE="SUBMIT">' +
			   '<input type="hidden" name="daddr" value="234 Poplar Street, Hanover, PA 17331" />' +
	'</div>';


var dwFromString ='<div style="text-align:left; font-size:12px">'+
	'<h3 style="margin:0px; padding:0px;">Address:</h3>'+
	'<p style="margin:0px; padding:0px;"><a href="http://maps.google.com/maps?f=q&amp;source=s_q&amp;hl=en&amp;geocode=&amp;q=234+poplar+street,+Hanover+PA+17331&amp;sll=37.0625,-95.677068&amp;sspn=49.223579,79.013672&amp;ie=UTF8&amp;view=map">234 Poplar St<br />'+
	'Hanover, PA 17331</a></p>'+
	'<br/>Get Directions: <a href="javascript:dwOpenTo();">To here<\/a> - <b>From here<\/b>' +
			   '<br><br>Start address:<form action="http://maps.google.com/maps" method="get" target="_blank">' +
			   '<input type="text" SIZE=25 name="daddr" id="saddr" value="" />' +
			   '<INPUT value="Go" TYPE="SUBMIT">' +
			   '<input type="hidden" name="saddr" value="234 Poplar Street, Hanover, PA 17331" />' +
	'</div>';
		
var fromwindow = new google.maps.InfoWindow({
	content: dwFromString
});	

var towindow = new google.maps.InfoWindow({
	content: dwToString
});		

function dwOpenTo(){
	fromwindow.close();
	towindow.open(map,marker);	
}

function dwOpenFrom(){
	towindow.close();
	fromwindow.open(map,marker);
	
}

dwOpenTo();