var Browser="null";
if (navigator.appName == "Netscape") Browser="NC";
if (navigator.appName == "Microsoft Internet Explorer") Browser="IE";

function divinit()
{
if (Browser=="NC") {divwidth=window.innerWidth;}
if (Browser=="IE") {divwidth=bbody.clientWidth;}
divpos=Math.round( (divwidth / 2) - 282) ;
}

function calc(_name,sshift){
divinit();
if (Browser=="NC")
{
	//document.layers[_name].left = divpos - 10 + sshift;
	newpos = divpos + sshift -10;
	//alert(newpos);
	document.getElementById(_name).style.left=newpos;
}
else
{
	newpos = divpos + sshift;
	//alert(newpos);
	document.getElementById(_name).style.left=newpos;

}

}