function changeButton(id, action) {

	var button = document.getElementById(id);
	if(action == 'on') {button.src = 'design/img/navIcons/'+id+'_n.jpg';}
	if(action == 'out') {button.src = 'design/img/navIcons/'+id+'_a.jpg';}
}

/**
* Funckja przełanczania zakładek w product_details
*/
function showTab(tab){
	document.getElementById('description_tab').style.display 	= 'none';
	document.getElementById('linked_tab').style.display 		= 'none';
	document.getElementById('questions_tab').style.display 		= 'none';
	document.getElementById('gallery_tab').style.display 		= 'none';


	first = '';
	var description = document.getElementById('description_but');
	if(description){
		description.className = 'active';
		first = 'description';
	}

	var linked = document.getElementById('linked_but');
	if(linked){
		linked.className = 'active';
		if(first==''){
			first = 'linked';
		}
	}

	var questions = document.getElementById('questions_but');
	if(questions){
		questions.className = 'active';
		if(first==''){
			first = 'questions';
		}
	}
	var gallery = document.getElementById('gallery_but');
	if(gallery){
		gallery.className = 'active';
	}

	if(tab==0){
		tab = first;
	}

	document.getElementById(tab+'_but').className = 'nonactive';
	document.getElementById(tab+'_tab').style.display = 'block';
	if(questions){
		document.getElementById('call_form').style.display = 'block';
	}
}

function czyscArea(ob) {
	if (ob.value == 'Twoje pytanie...') {
		ob.value = '';
	}
}

function beginTab(){
	showTab(0);
}