I have several places with their latitude and longitude. I want to display them in google map. Thats ok, what i can't is to display the marker at the specific lat,long position.
e.g. if i've the following code, is it possible just to place an option to display the market as well because all the lat,long coord are comming from a database and echoed with php
<iframe width="425" height="350" frameborder="0" scrolling="no"
marginheight="0" marginwidth="0"
src="http://maps.google.mu/?ie=UTF8&ll=-20.234496,57.603722&spn=0.093419,0.169086&t=m&z=13&
output=embed"></iframe>
<br />
<small><a href="http://maps.google.mu/?ie=UTF8&ll=-20.234496,57.603722
&spn=0.093419,0.169086&t=m&z=13&source=embed"
style="color:#0000FF;text-align:left">View Larger Map
</a>
</small>
The element that you posted looks like it's just copy-pasted from the Google Maps embed feature.
If you'd like to drop markers for the locations that you have, you'll need to write some JavaScript to do so. I'm learning how to do this as well.
Check out the following: https://developers.google.com/maps/documentation/javascript/overlays
It has several examples and code samples that can be easily re-used and adapted to fit your current problem.