function ResetCheck()
{
 chk = window.confirm("Do you really want to delet all data?");
 return chk;
}

function emailCheck (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 (matchArray==null) {

        alert("email-address not correct!");
        return false;
}
var user=matchArray[1];
var domain=matchArray[2];

// See if "user" is valid
if (user.match(userPat)==null) {
    // user is not valid
    alert("email-address not correct!");
    return false;
}


var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
          for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
                alert("email-address not correct!");
                return false;
            }
    }
    return true;
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
        alert("email-address not correct!")
    return false
}




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>3) {
   // the address must end in a two letter or three letter word.
   alert("email-address not correct!")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="email-address not correct!"
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}
//  End




function chkFormular()
{
	if(document.butravel.name_txt.value == "")
    {
     alert("Please fill field: Name!");
     document.butravel.name_txt.focus();
     return false;
    }
   if(document.butravel.address_txt.value == "")
    {
     alert("Please fill field: Address!");
     document.butravel.address_txt.focus();
     return false;
    }
	if(document.butravel.telephone_txt.value == "")
    {
     alert("Please fill field: Telephone!");
     document.butravel.telephone_txt.focus();
     return false;
    }
	
   
	if(document.butravel.email_txt.value == "")
	{
	alert("Please fill field: email!");
     document.butravel.email_txt.focus();
     return false;
   }
   
   if(document.butravel.email_txt.value != "")
    {
     if (emailCheck (document.butravel.email_txt.value) == false) {
		 		document.butravel.email_txt.value = "";
		 		document.butravel.email_txt.focus();
                 return false;
        }
    }
	
	if(!document.butravel.need_cb1.checked && !document.butravel.need_cb2.checked && !document.butravel.need_cb3.checked  && !document.butravel.need_cb4.checked && !document.butravel.need_cb5.checked && !document.butravel.need_cb6.checked && !document.butravel.need_cb7.checked && document.butravel.need_txt.value == "")
	{
	alert("Please select Your needs!");
     document.butravel.email_txt.focus();
     return false;
   }
	
return true;
 }