// Ajax.js START

// here we define global variable
var ajaxdestination="";

function getdata(what,where) { // get data from source (what)
 try {
   xmlhttp = window.XMLHttpRequest?new XMLHttpRequest():
  		new ActiveXObject("Microsoft.XMLHTTP");
 }
 catch (e) { /* do nothing */ }

 document.getElementById(where).innerHTML ="<center><img id='loading' src='/assets/loading.gif'></center>";
// we are defining the destination DIV id, must be stored in global variable (ajaxdestination)
 ajaxdestination=where;
 xmlhttp.onreadystatechange = triggered; // when request finished, call the function to put result to destination DIV
 xmlhttp.open("GET", what);
 xmlhttp.send(null);
  return false;
}

function triggered() { // put data returned by requested URL to selected DIV
  if (xmlhttp.readyState == 4) if (xmlhttp.status == 200) 
    document.getElementById(ajaxdestination).innerHTML =xmlhttp.responseText;
}

// Ajax.js END

function postcodesearch() {
	var postcode;
	postcode=document.getElementById('postcode').value+'';
	if(postcode=='enter postcode' || postcode.indexOf(' ')<1){
		alert('Please enter a valid UK postcode.');
	}else{
		getdata('findpostcode.php?postcode='+postcode,'ispostcodecovered');
	}
}

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_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 == '');
}