dom = (document.getElementById)? true : false;
nn4 = (document.layers)? true : false;
ie4 = (!dom && document.all)? true : false;

var overcolor = '#dddddd';
var outcolor = '#eeeeee';

var s=screen.width;
var d=document;

if (nn4){document.write("<link href='service/style_nn.css' rel='stylesheet' type='text/css'>");}
else{document.write("<link href='service/style_ie.css' rel='stylesheet' type='text/css'>");}

function bgL (div)
{
          if (dom) document.getElementById(div).style.backgroundColor = overcolor;
          if(ie4) document.all[div].style.backgroundColor = overcolor;
          if(nn4) document.layers[div].bgColor = overcolor;
}

function bgP (div)
{
          if (dom) document.getElementById(div).style.backgroundColor = outcolor;
          if(ie4) document.all[div].style.backgroundColor = outcolor;
          if(nn4) document.layers[div].bgColor = outcolor;
}