function check_search_form(){
	var CityID = document.search_form.user_select_city.value * 1;
	var EstateTypeID = document.search_form.user_select_estate_type.value * 1;
	var PriceFrom = document.search_form.PriceFrom.value * 1;
	var PriceTo = document.search_form.PriceTo.value * 1;
	var AreaFrom = document.search_form.AreaFrom.value * 1;
	var AreaTo = document.search_form.AreaTo.value * 1;
	var RentSale = document.search_form.RentSale.value;

	var MadeOfArray = new Array();
	MadeOfArray = document.search_form.made_of;
	var MadeOf = '';
	for(var i = 0; i < MadeOfArray.length; i++){
		if(MadeOfArray[i].checked){
			MadeOf += "'" + MadeOfArray[i].value.toUpperCase() + "',";
		}
	}

	if((!CityID) && (!EstateTypeID) && (!PriceFrom) && (!PriceTo) && (!AreaFrom) && (!AreaTo) && (!RentSale) && (!MadeOf)){
		alert('Моля, въведете поне един критерий за търсене.');
	} else {
		document.search_form.NewSearch.value = 1;
		document.search_form.MadeOf.value = MadeOf;
		if(document.search_form.NewSearch.value == 1)
			document.search_form.submit();
	}
}