browser=navigator.appName;
browserNum=parseInt(navigator.appVersion);
//alert(browser);
if((browser=="Netscape") && (browserNum<5))
{
	//Netscape 4.x
	layerRef="document.layers['";
	endLayerRef="']";
	styleRef="";
	screen_width="innerWidth";
    screen_height="innerHeight";
	cssrules="cssRules[";
	endcssrules="]";
}

else if ((browser=="Netscape") && (browserNum>=5))
{
	//Netscape 6.x
	layerRef="document.getElementById('";
	styleRef=".style";
	endLayerRef="')";
	screen_width="innerWidth";
    screen_height="innerHeight";
	cssrules="cssRules[";
	endcssrules="]";
}

else
{
	//Internet Explorer
	layer="document.all";
	layerRef="document.all['";
	endLayerRef="']";
	styleRef=".style";
	screen_width="document.body.clientWidth";
    screen_height="document.body.clientHeight";
	cssrules="rules[";
	endcssrules="]";
}