function look(image)
    {
        document.map.src=image;
		if(image == "image/map2.gif"){
			val = '<div class=\"ct\">&nbsp;<a href="#MAP" onclick="look(\'image/map1.gif\');" onkeypress="look(\'image/map1.gif\');">地図1</a>&nbsp;&nbsp;/&nbsp;<span class="this_map">&nbsp;<strong>地図2</strong>&nbsp;</span></div>';
		}
		else{
			val = '<div class=\"ct\"><span class="this_map">&nbsp;<strong>地図1</strong>&nbsp;</span>&nbsp;/&nbsp;<a href="#MAP" onclick="look(\'image/map2.gif\');" onkeypress="look(\'image/map2.gif\');">地図2</a>&nbsp;</div>';
		}
		document.getElementById('which_map').innerHTML = val;
    }