function Change(id) {
document.getElementById (id).style.backgroundImage = 'url(images/link_on.gif)'; }

function Restore(id) {
document.getElementById (id).style.backgroundImage = 'url(images/link_off.gif)'; }

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("Uneta e - mail adresa nije validna!")
return false
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
alert("Uneta e - mail adresa nije validna!")
return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
alert("IP primaoca nije validan!")
return false
}
}
return true
}
var domainArray=domain.match(domainPat)
if (domainArray==null) {
alert("Uneta e - mail adresa nije validna!")
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) {
alert("Uneta e - mail adresa nije validna!")
return false
}
if (len<2) {
alert("Uneta e - mail adresa nije validna!")
alert(errStr)
return false
}
return true;
}

function Validate()
{
if (document.forms[0].elements[0].value == "")
{
alert("Niste uneli Vase ime!");
document.contact_form.name.focus();
return (false);
}

if (document.forms[0].elements[1].value == "")
{
alert("Niste uneli Vasu e-mail adresu!");
document.contact_form.email.focus();
return (false);
}
if (!emailCheck (document.forms[0].elements[1].value) )
{
document.contact_form.email.focus();
return (false);
}

if (document.forms[0].elements[2].value == "")
{
alert("Niste uneli naslov poruke!");
document.contact_form.subject.focus();
return (false);
}

if (document.forms[0].elements[3].value == "")
{
alert("Niste uneli tekst poruke!");
document.contact_form.message.focus();
return (false);
}

return(true);
}
function prikazi(pix,width,height,size) {
  window.open('show.php?size='+size+'&slika='+pix+'.jpg','slicica','width='+width+',height='+height+',target=_blank,toolbar=no,resizable=no');}
  
document.write("<link href='navlink.css' type='text/css' rel='stylesheet'>");