function findQuantity(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 validateQuantity(target)
{
	var errors='';
	var val=findQuantity(target);
	if (val)
	{
		if ((val=val.value)!="")
		{
			if (isNaN(val))
				errors+='- Quantity must contain a number.\n';
			else
				if ( ((parseFloat(val)-parseInt(val))!=0) || (val<=0) )
					errors+='- Quantity is required.\n';
		}
		else
			errors += '- Quantity is required.\n';
	}
	if (errors)
		alert('The following error(s) occurred:\n'+errors);
	document.MM_returnValue = (errors == '');
}