function toggleswitch_bilder(div)
{
var option=['div04b','div05b','div06b','div07b','div08b','div09b','div10b','div11b','div12b','div13b','div14b','div15b','div16b','div17b','div18b','div19b','div20b','div21b','div22b','div23b','div24b']; 
for(var i=0; i<option.length; i++)
{ obj=document.getElementById(option[i]);
obj.style.display=(option[i]==div) && !(obj.style.display=="block")? "block" : "none"; }
}