function validate_email(em) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(em) == false) {
      return false;
   }
   else return true;
}

function goto_project(){
	if($('#selectproject').val() == ''){
		window.location = $('#url_site').val() + 'past_prj.php';
	}
	else{
		window.location = $('#url_site').val() + 'projects/' + $('#selectproject').val() + '.php';
	}
}

function select_project(){
	if ($('#selecttype').val() == ''){
		alert("Please choose type");
		return false;
	}
	if ($('#selectcategory').val() == ''){
		alert("Please select category");
		return false;
	}
	if($('#describe').val() == ''){
		alert("Please describe your project");
		$('#describe').focus();
		return false;
	}
return true;
}

function validate_feedback(){
	var n = $('#name'); var nn = jQuery.trim(n.val()); n.val(nn);
	var w = $('#when'); var ww = jQuery.trim(w.val()); w.val(ww);
	var em = $('#email'); var emem = jQuery.trim(em.val()); em.val(emem);
	var i = $('#info'); var ii = jQuery.trim(i.val()); i.val(ii);
	
	if(nn.length < 1){
		alert('Please write your name!');
		n.focus();
		return false;
	}
	if(ww.length < 1){
		alert("Please write when was your project completed by DL Restoration!");
		w.focus();
		return false;
	}
	if(emem.length > 0){
		if(!validate_email(emem)){
			alert("E-mail address is invalid!");
			em.focus();
			return false;
		}
	}
	if(ii.length < 1){
		alert('Please describe your experience with DL Restoration!');
		i.focus();
		return false;
	}
	return true;
}

function toggle(id){
	$("#"+id).slideToggle('slow');
}