function toggle(div)
{
if (document.getElementById('deptstore_directory_level1'))
{
var option=['deptstore_directory_basement1','deptstore_directory_level1','deptstore_directory_level2','deptstore_directory_level3','deptstore_directory_level4'];
for(var i=0; i<option.length; i++) 
{ obj=document.getElementById(option[i]);
obj.style.display=(option[i]==div)? "block" : "none"; }
}
}