Untitled

<!DOCTYPE html>
<html>
	<head>
		<title>Register page</title>
		<link rel="stylesheet" type="text/css" href="project_style.css">
	</head>

	</body>
		<div class="slideshow_container">

    		<div class="mySlides fade">
    			<img src="motor_jedan.jpg" style="width:100%">
      		</div>

      		<div class="mySlides fade">
        		<img src="motor_dva.jpg" style="width:100%">
      		</div>
			<div class="mySlides fade">
        		<img src="motor_tri.jpg" style="width:100%">
      		</div>
  		</div>
  		<script>
    		var slideIndex = 0;
    		showSlides();

        	function showSlides() {
	          	var i;
	          	var slides = document.getElementsByClassName("mySlides");
	          	for (i = 0; i < slides.length; i++) {
	            	slides[i].style.display = "none";
	          	}
	          	slideIndex++;
	          	if (slideIndex > slides.length) {slideIndex = 1}
	          	slides[slideIndex-1].style.display = "block";
	          	setTimeout(showSlides, 2000); // Change image every 2 seconds
    		}
  		</script>
  		<form>
  			<h2><center>Register</center></h2>
	  		<form method="post">
	  		<div class="input-group">
	  	  		<label>Username</label>
	  	  		<input type="text" name="username" id="username_input" value="">
	  		</div>
	  		<div class="input-group">
	  	  		<label>Email</label>
	  	  		<input type="email" name="email" id="email_input" value="">
	  		</div>
	  		<div class="input-group">
	  	  		<label>Password</label>
	  	  		<input type="password" name="password_1" id="password_input">
	  		</div>
	  		<div class="input-group">
	  	  		<label>Confirm password</label>
	  	  		<input type="password" name="password_2" id="pasword_input_2">
	  		</div>
	  		<div class="input-group">
	  	  		<button type="button" class="btn" name="reg_user" onclick="Reg_Function()">Registracija</button>
	  		</div>
	  		<p>Posedujete nalog? - <a href="login.php">Login</a></p>
	    	<p id="error_paragraph"></p>
  		</form>
  		<script>
		      function Reg_Function(){
			      var output_message, inputed_text_username, inputed_text_email, inputed_text_passowrd, inputed_text_passowrd_2;
			      output_message = document.getElementById("error_paragraph");
			      output_message.innerHTML = "";
			      inputed_text_username = document.getElementById("username_input").value;
			      inputed_text_email = document.getElementById("email_input").value;
			      inputed_text_password = document.getElementById("email_password_input").value;
			      try {
			        if(inputed_text_username=="") throw "Niste uneli korisnicko ime!";
			        if(!isNaN(inputed_text_username)) throw "Korisnicko ime mora biti u obliku slovnog karaktera!"

			        if(inputed_text_email=="") throw "Niste uneli email adresu!";
			      }
			      catch(err){
			        alert(err);
			        output_message.innerHTML = "Greska je " + err;
      			  }
    		  }
  		</script>
	</body>
</html>