function img(iName,str){ document.images[iName].src = str;}

var Win = navigator.appVersion.indexOf('Win',0) != -1;
	var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
var IE = navigator.appName.indexOf('Microsoft',0) != -1;
var NN4 = Boolean(document.layers);
if(Win&&IE){
document.write('<link rel="stylesheet" href="css/base_style_ie.css" type="text/css">');
}
else if(Win&&NN4){
document.write('<link rel="stylesheet" href="css/base_style_nn.css" type="text/css">');
}
else {
document.write('<link rel="stylesheet" href="css/base_style.css" type="text/css">');
}