function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

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;
}

function checkall(formname,checkname,thestate){
var el_collection=eval("document.forms."+formname)
for (c=0;c<el_collection.length;c++)
{
if(el_collection[c].id==checkname) el_collection[c].checked=thestate;
}

}

function textCounter(field,cntfield,maxlimit) {
if (field.value.length > maxlimit) // if too long...trim it!
field.value = field.value.substring(0, maxlimit);
// otherwise, update 'characters left' counter
else
cntfield.value = maxlimit - field.value.length;
}

function confirmSubmit(){
var agree=confirm("Are you sure you wish to continue?");
if (agree)
	return true ;
else
	return false ;
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}

function hideSelect()
{if (document.all){document.all.formselect.style.visibility="hidden";}}

function unhideSelect()
{if (document.all){document.all.formselect.style.visibility="visible";}}

function whoto()  {
	document.write  ('<input type="hidden" name="recipient" value="marlow@newerainternet.com">');
}
function salesem() {
document.write ('<a href="mailto:sales@amazonfilters.co.uk">sales@amazonfilters.co.uk</a>');
}

function showhide (id, toggle, option) {
	var objId =  id;
	var visible = toggle;
	
	if((document.getElementById(objId) != null) || (parent.document.getElementById(objId) != null))
	{
		if(visible == 'hide') {
			if(option == 'parent')
			{
				parent.document.getElementById(objId).style.display = 'none';
			}
			else
			{
				document.getElementById(objId).style.display = 'none';
			}
		}
		else
		{
			if(option == 'parent')
			{
				parent.document.getElementById(objId).style.display = 'block';
			}
			else
			{
				document.getElementById(objId).style.display = 'block';
			}
		}
	}
}

function changetext (id, text){	
	
	var obj = document.getElementById(id);
	obj.innerHTML = text;
}

function changevalue(id,data){	
	
	var obj = document.getElementById(id);
	opener.obj.value = data;
}