function validateForm()
	{
		var bool = true;
		var sort_by = document.getElementById('sort_prod_categ');
		var sort_way = document.getElementById('sort_way_prod_categ');
		var items = document.getElementById('nr_prod_categ');
		var email = document.getElementById('email');
		var numericExpression = /^[0-9]+$/;
		var textExpression = /^[a-zA-Z]+$/;
		var emailExpression = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
		
		if(items.value.match(numericExpression) && sort_by.value.match(textExpression))
		{
			answer = "";
		}
		else
		{
			answer = "You need to insert only numbers!";
			bool = false;
		}
		
		if(items.value.length < 2 || items.value.length > 6)
		{
			answer = answer + " You should insert between 2 and 6 nr!";
			items.value = "";
			items.focus();
			bool = false;
		}
		
		if(!email.value.match(emailExpression))
		{ 
			answer = answer + " The email is not valid!";
			bool = false;
		}
		
		
		
		if(answer != "")
		{
			alert(answer);
		}
		
		return bool;
	}

	function thisAlert()
	{
		vat = document.getElementById('vat').value;
		product = document.getElementById('product').value;
		product_display = document.getElementById('product');
		total = product*(vat/100+1);
		total_display = document.getElementById('total_price');
		total_display.value = total;
	}
	
	// These functions are for the fade in messages / pictures
	
	function showMessage(type)
	{
		message = type;
		switch(message)
		{
			case '1':
				dark = document.getElementById('opaque');
				box = document.getElementById('message_box');
				dark.className = 'opaque_full';
				box.className = 'message_full';
				para = box.getElementsByTagName('p')[0];
				para.style.textAlign = 'center';
				para.innerHTML = '<img src="img/loading/loading15.gif" alt="loading..." />';
				setTimeout("para.style.textAlign = 'left'; para.innerHTML = 'asdasd'", 2000);
				break;
			default:
				//alert('help');
				break;
		}
	}
	
	function closeMessage()
	{
		document.getElementById('opaque').className = 'opaque_none';
		document.getElementById('message_box').className = 'message_none';
	}
	
	function goToPage()
	{
		obj = document.getElementById('go_to_page').value;
		href = document.getElementById('go').href;
		href = href + '&p=' + obj;
		//alert(href);
		document.getElementById('go').href = href;
	}
	
	function hideText(id) 
	{
		document.getElementById(id).value='';
	}