function navactionOver(el) {
	var cssclass=el.className;
	var cssprefix=cssclass.substring(0, cssclass.indexOf("_"));
	el.className=cssprefix+"_over";
}

function navactionOut(el) {
	var cssclass=el.className;
	var cssprefix=cssclass.substring(0, cssclass.indexOf("_"));
    el.className=cssprefix+"_out";
}

function dropdownMenu(layer_, show_) {
	var node   = document.getElementById("n_"+layer_);
	var oLayer = document.getElementById("l_"+layer_);
	var table  = document.getElementById("t_"+layer_);
	var pos    = findPosition(node);

	oLayer.style.left=pos[0];
	oLayer.style.top=pos[1]+32;
	oLayer.style.height=(table.rows.length+1)*10+(table.rows.length+1)/2;


	if(show_) {
		MM_showHideLayers("l_"+layer_,'','show');
	}else {
		MM_showHideLayers("l_"+layer_,'','inherit');
	}
}

function findPosition( oLink ) {
  if( oLink.offsetParent ) {
    for( var posX = 0, posY = 0; oLink.offsetParent; oLink = oLink.offsetParent ) {
      posX += oLink.offsetLeft;
      posY += oLink.offsetTop;
    }
    return [ posX, posY ];
  } else {
    return [ oLink.x, oLink.y ];
  }
}

function chooseProduct(obj, lang) {
  nodeid=parseInt(obj.value);     
  if (nodeid !=171 && nodeid !=96){
      if(nodeid>0)
        window.location.href="index.php?id="+obj.value+"&lang="+lang;
    }
  else if (nodeid == 171){
      window.open("http://sk.geze.com.cn/en/home.asp");
    }
  else{
      window.open("http://sk.geze.com.cn/home.asp");
    }
}

function goGeze(obj) {
  var url=obj.value;
  if(url.length>0)
    window.open(url, "_blank");
}

function addToFavorites() {
	if (window.external) {
		window.external.AddFavorite('http://www.geze.com.cn', 'www.geze.com.cn');
  } else {
  	alert("failed to add to favorites");
  }
}