function OpenExternalLink(url) {
  window.open('external.aspx?' + url,'ExternalLink','toolbar=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=550,height=350');
}

function OpenWindow(url) {
  window.open(url, 'xstudioPopup','toolbar=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=550,height=350');
}

function changeBgColor(obj,color) {
  obj.style.backgroundColor = color;
}

function swapImgRestore() {
  var i,x,a=document.sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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

function findObj(n, d) {
  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=findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function swapImage() {
  var i,j=0,x,a=swapImage.arguments; document.sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=findObj(a[i]))!=null){document.sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


function CheckEmailFormat(emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	if (emailStr.length==0) {
		return -1;	//Email is empty
	}
	if (matchArray==null) {
		return -2;	//Email address seems incorrect (check @ and .'s)
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
		return -3;	//The username doesn't seem to be valid.
	}
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				return -4;	//Destination IP address is invalid!
			}
		}
		return 1;		//Email format is valid
	}
	
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		return -5;	//The domain name doesn't seem to be valid.
	}
	
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
	    domArr[domArr.length-1].length>5) {
	    	return -6;	//The address must end in a three-letter domain, or two letter country.
	}
	
	if (len<2) {
		return -7;	//This address is missing a hostname!
	}
	return 1;	//Email format is valid
}


function CheckEmail(emailStr) {
	var destinationURL = '/xstudio/Newsletter.aspx';
	if(CheckEmailFormat(emailStr) != 1)
	{
		alert('ATTENZIONE:\ninserire un indirizzo email valido');
	}
	else
	{
		window.location = destinationURL + '?e=' + emailStr;
	}
}