function checkEmail(strng) {
	var error = "";
	var emailFilter=/^.+@.+\..{2,6}$/;
	if (!(emailFilter.test(strng))) {
		return false;
	}
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\] ']/
	if (strng.match(illegalChars)) {
		return false;
	}
	return true;
}

function formVal(thefields,emailfields) {
	thereturn = true;
	if (thefields!='') {
		fparts = thefields.split(",");
		for (i = 0; i < fparts.length; i++) {
			if (document.getElementById(fparts[i]).value=='') {
				document.getElementById(fparts[i]).style.background='#ff0000';
				thereturn = false;
			}else{
				document.getElementById(fparts[i]).style.background='#ffffff';
			}
		}
	}
	if (emailfields!='') {
		fparts = emailfields.split(",");
		for (i = 0; i < fparts.length; i++) {
			if (!checkEmail(document.getElementById(fparts[i]).value)) {
				document.getElementById(fparts[i]).style.background='#ff0000';
				thereturn = false;
			}else{
				document.getElementById(fparts[i]).style.background='#ffffff';
			}
		}
	}
	
	if (thereturn==false) { alert('You must complete all required fields'); }
	return thereturn;
}

function copybilling() {
	theEl = document.getElementById('usebilling');
	if (theEl.checked) {
		document.getElementById('shipnametitle').value	= document.getElementById('nametitle').value;
		document.getElementById('shipforename').value 	= document.getElementById('forename').value;
		document.getElementById('shipsurname').value 	= document.getElementById('surname').value;
		document.getElementById('shipaddress1').value 	= document.getElementById('address1').value;
		document.getElementById('shipaddress2').value 	= document.getElementById('address2').value;
		document.getElementById('shipaddress3').value 	= document.getElementById('address3').value;
		document.getElementById('shiptown').value 		= document.getElementById('town').value;
		document.getElementById('shipcounty').value 	= document.getElementById('county').value;
		document.getElementById('shippostcode').value 	= document.getElementById('postcode').value;
		document.getElementById('shiptelephone').value 	= document.getElementById('telephone').value;
	}else{
		document.getElementById('shipnametitle').value	= "Mr";
		document.getElementById('shipforename').value 	= "";
		document.getElementById('shipsurname').value	= "";
		document.getElementById('shipaddress1').value 	= "";
		document.getElementById('shipaddress2').value 	= "";
		document.getElementById('shipaddress3').value 	= "";
		document.getElementById('shiptown').value 		= "";
		document.getElementById('shipcounty').value 	= "";
		document.getElementById('shippostcode').value 	= "";
		document.getElementById('shiptelephone').value 	= "";
	}
	
}

function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 	} 
} 

try {
  document.execCommand("BackgroundImageCache", false, true);
} catch(err) {}

window.onload = externalLinks;