var path = path_modifier + "graphics/buttons/"
var iswap = false

if(document.images)
{    
  iswap = true;
}

function i_chng(iname, state, layer_modifier)
{
  if (iswap) {
    if (document[layer_modifier + iname].src.indexOf(iname + "_hi.gif") == -1) {
      document[layer_modifier + iname].src= (path + layer_modifier + iname + state + ".gif");
	}
  }
}