function checkInfo(){

	var username 		= document.getElementById("username").value
	var password 		= document.getElementById("password").value
	var ime 			= document.getElementById("ime").value
	var prezime 		= document.getElementById("prezime").value
	var email	 		= document.getElementById("email").value
	var pattern_email 	= new RegExp( '^([a-zA-Z0-9\\-\\.\\_]+)(\\@)([a-zA-Z0-9\\-\\.]+)([\\.])([a-zA-Z]{2,4})$' );
	var captcha	 		= document.getElementById("captchaInput").value
	
	var error = new Array()
	submitOK = "true"
	var j
	var i = 0
	var porukaGreska

	if (username.length < 1){
	
		error[i] = "Korisničko ime"
		i = i + 1
		submitOK = "false"
	}
	if (password.length < 1){
	
		error[i] = "Lozinka"
		i = i + 1
		submitOK = "false"
	}
	if (ime.length < 1){
	
		error[i] = "Ime"
		i = i + 1
		submitOK = "false"
	}
	if (prezime.length < 1){
	
		error[i] = "Prezime"
		i = i + 1
		submitOK = "false"
	}
	if ( !pattern_email.test(email) ){
	
		error[i] = "E-mail"
		i = i + 1
		submitOK = "false"
	}
	if (captcha.length != 5){
	
		error[i] = "Potvrdni kod"
		i = i + 1
		submitOK = "false"
	}
	if (submitOK == "false"){
	
		porukaGreska = "Potrebno je popuniti sljedeca polja forme:\n\n"
		
		for(j = 0; j < i; j++){
																	
			porukaGreska += error[j] + "\n"
		}
		alert(porukaGreska)
		return false
	}
}