Google Map Not Shown

I write a web page, and inserted Google Map into it. But the map always not shown. I tried to use Firebug to see what happened, and found there are no errors. The div of map-canvas

Solution 1:

You didn't set the dimensions of the map div, but of the div that the map is nested in. Add height and width properties to div id 'map-canvas' and the map should appear.

    <div id="map-canvas" style="width: 400px; height: 400px;">Loading...</div>

Solution 2:

Your map div doesn't have a size. This:

<div id="map-canvas" style="height:300px; width:300px;"> 

makes it display for me.