var agt = navigator.userAgent.toLowerCase(); 
this.mac = (agt.indexOf("mac")!=-1);

function checkbrow(){
	if ((navigator.appVersion.charAt(0) < 4) || (agt.indexOf('webtv') != -1)) {
		alert('please upgrade your browser');
	}
}
checkbrow();
// DETECT BROWSER DOM
var isIE = (document.all) ? true : false;
var isNS4 = (document.layers) ? true:false;
var isNS6 = (document.getElementById && !document.all) ? true : false;
// ASSIGN BROWSER DOM DIFFERENCES
if (isNS4) {
	doc = 'document.layers["';
	sty = '"]';
} else if(isIE) {
  doc = "document.all.";
  sty = ".style";
} else if (isNS6) {
	doc = "document.getElementById('";
  sty = "').style";
}




window.defaultStatus = 'New England Office Supply';


// FORM HANDLING //

function validForm() {
	if (!nonBlank(document.frmShop.user, "Username")) {
		return false;
	}
	if (!nonBlank(document.frmShop.pw, "Password")) {
		return false;
	}
}


function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}