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_changeProp(objName,x,theProp,theValue) { //v6.0
  var obj = MM_findObj(objName);
  if (obj && (theProp.indexOf("style.")==-1 || obj.style)){
    if (theValue == true || theValue == false)
      eval("obj."+theProp+"="+theValue);
    else eval("obj."+theProp+"='"+theValue+"'");
  }
}

function validateContact()
{
    msg="";
    if(document.contactForm.comments.value=="")
    {
        msg="Το πεδίο 'Mήνυμα' είναι υποχρεωτικό!";
    }
    if(document.contactForm.full_name.value=="")
    {
        msg="Το πεδίο 'Ονοματεπώνυμο' είναι υποχρεωτικό!";
    }
    if(document.contactForm.email.value=="")
    {
        msg="Το πεδίο 'email' είναι υποχρεωτικό!";
    }
    
    if(msg!="")
    {
        alert(msg);
    }
    else
    {
        document.contactForm.submit();
    }
}

function OpenNewWindow(url,windowWidth,windowHeight,name){
    myleft=(screen.width)?(screen.width-windowWidth)/2:100;
    mytop=(screen.height)?(screen.height-windowHeight)/2:100;
    properties = "width="+windowWidth+",height="+windowHeight+",scrollbars=yes, top="+mytop+",left="+myleft;
    window.open(url,name,properties)
}