// JavaScript Document

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_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 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 write_preloader () {
	/*to_write = '<div id="pre_loader">';
	to_write += '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="150" height="150">';
	to_write += '<param name="movie" value="flash/petal_preloader.swf" />'; 
	to_write += ' <param name="quality" value="high" />'; 
	to_write += '<embed src="flash/petal_preloader.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="150" height="150"></embed>'; 
	to_write += '</object>'; 
	to_write += '<p style="text-align: center;">loading...</p>'; 
	to_write += '</div>'; 
	document.write (to_write);*/
}

function clear_preloader (){
	document.getElementById ('pre_loader').style.display = 'none';
}

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);
  if (errors == ''){
  	addRegister();
  }
  document.MM_returnValue = (errors == '');
}

function addRegister (){
	var register = document.getElementById('register');
	var toAdd = register.checked == 1 ? "Please register me with Lucius Books. \r\n" : "";
	document.getElementById('message').value = toAdd + document.getElementById('message').value;
	return false;
}

function clear_basket(){
	xmlhttp=null
	// code for Mozilla, etc.
	if (window.XMLHttpRequest){
		xmlhttp=new XMLHttpRequest();
	}
	// code for IE
	else if (window.ActiveXObject){
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	if (xmlhttp!=null){
		xmlhttp.onreadystatechange=state_Change;
		xmlhttp.open("GET",'destroy_cart.php',true);
		xmlhttp.send(null);
	}
}

function update_name(){
	var name_title = document.getElementById('name_title').value;
	var name_firstname = document.getElementById('name_firstname').value;
	var name_surname = document.getElementById('name_surname').value;
	var inv_name = document.getElementById('inv_name');
	inv_name.value = name_title + ' ' + name_firstname + ' ' + name_surname;
}