function validate_ponuda_frm(lng){
	
	var form = document.ponuda_frm;
	var ulica = form.ulica;
	var kv = form.kv;
	var cena = form.cena;
	var k_ime = form.k_ime;
	var k_mob = form.k_mob;
	
	if (ulica.value==null||ulica.value==""){
     if(lng=="eng")
		 alert("Please enter your street!");
	 else
	 	alert("Niste uneli ulicu!");
	 ulica.focus();
	 return false;
    }
	if (kv.value==null||kv.value==""){
	 if(lng=="eng")
     	alert("Please enter space!");
	 else
		alert("Niste uneli kvadraturu!");
	 kv.focus();
	 return false;
    }
	if (cena.value==null||cena.value==""){
     if(lng=="eng")
	 	alert("Please enter price!");
	 else
	 	alert("Niste uneli cenu!");
	 cena.focus();
	 return false;
    }
	if (k_ime.value==null||k_ime.value==""){
     if(lng=="eng")
	 	alert("Please enter your name!");
	 else
		alert("Niste uneli ime!");	
	 k_ime.focus();
	 return false;
    }
	if (k_mob.value==null||k_mob.value==""){
      if(lng=="eng")
	  	alert("Please enter your cell phone number!");
	  else
	  	alert("Niste uneli broj mobilnog!");
	 k_mob.focus();
	 return false;
    }
	
	return true;
	
}

function check_potraznja(lng){
	var form = document.potraznja_frm;
	var datum = form.datum;
	var stanar = form.stanar;
	var k_ime = form.k_ime;
	var k_mob = form.k_mob;
	
	if (datum.value==null||datum.value==""){
     if(lng=="eng")
	 	alert("Please enter date!");
	 else
		alert("Niste uneli datum!");
	 datum.focus();
	 return false;
    }
	if (stanar.value==null||stanar.value==""){
      if(lng=="eng")
	  	alert("Please enter who will live in property!");
	 else
		alert("Niste uneli ko bi ziveo u stanu!");
	 stanar.focus();
	 return false;
    }
	if (k_ime.value==null||k_ime.value==""){
      if(lng=="eng")
	  	alert("Please enter your name!");
	 else
	 	alert("Niste uneli ime!");
	 k_ime.focus();
	 return false;
    }
	if (k_mob.value==null||k_mob.value==""){
     if(lng=="eng")
	 	alert("Please enter your cell phone number!");
	 else
		alert("Niste uneli broj mobilnog!");
	 k_mob.focus();
	 return false;
    }
	//return true;
	return check_email_obv()
}

function validate_kontakt_frm(lng){
	
	var form = document.kontakt_frm;
	var name = form.name;
	var email = form.email;
	var telefon = form.telefon;

	
	if (name.value==null||name.value==""){
     if(lng=="eng")
	 	alert("Please enter your name!");
	 else
	 	alert("Niste uneli ime!");
	 name.focus();
	 return false;
    }
	if ( (email.value==null || email.value=="") && ( telefon.value==null || telefon.value=="") ){
     if(lng=="eng")
	 	alert("You must enter either email or phone number!");
	 else
	 	alert("Niste uneli email ili telefon!");
	 email.focus();
	 return false;
    }
	
	return true;
	
}


function check_email_obv(lng){

	var obav = document.getElementById("obavestenje-email");
	var email = document.getElementById("k_email");	
	if(obav.checked){
		if ((email.value==null)||(email.value=="")){
			if(lng=="eng")
				alert("Please enter your email, where we can send you information!")
			else
				alert("Niste uneli email na koji zelite da dobijate obavestenja!")
			email.focus()
			return false
		}
		if (echeck(email.value)==false){
			if(lng=="eng")
				alert("please enter valid email!")
			else
				alert("Morate uneti ispravan email!")
			email.focus()
			return false
		}
		return true
	}	
	return true
}


function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }
		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
 		 return true					
	}