var pricesort;
var discountsort;
var productdatesort;

function sort() {
	pricesort = document.getElementById("pricesort");
	discountsort = document.getElementById("discountsort");
	productdatesort = document.getElementById("productdatesort");
}

function displayrelation() {
	pricesort.style.display = "none";
	discountsort.style.display = "none";
	productdatesort.style.display = "none";
}

function displaypricesort() {
	pricesort.style.display = "block";
	discountsort.style.display = "none";
	productdatesort.style.display = "none";
}

function displaydiscountsort() {
	pricesort.style.display = "none";
	discountsort.style.display = "block";
	productdatesort.style.display = "none";
}

function displaysalequantitysort() {
	pricesort.style.display = "none";
	discountsort.style.display = "none";
	productdatesort.style.display = "none";
}

function displayproductdatesort() {
	pricesort.style.display = "none";
	discountsort.style.display = "none";
	productdatesort.style.display = "block";
}

function priceasc() {
	document.getElementById("usersort").value = "1";
	document.forms['search_form'].submit();
}

function pricedesc() {
	document.getElementById("usersort").value = "2";
	document.forms['search_form'].submit();
}

function discountasc() {
	document.getElementById("usersort").value = "3";
	document.forms['search_form'].submit();
}

function discountdesc() {
	document.getElementById("usersort").value = "4";
	document.forms['search_form'].submit();
}

function salequantityasc() {
	document.getElementById("usersort").value = "7";
	document.forms['search_form'].submit();
}

function salequantitydesc() {
	document.getElementById("usersort").value = "0";
	document.forms['search_form'].submit();
}

function productdateasc() {
	document.getElementById("usersort").value = "5";
	document.forms['search_form'].submit();
}

function productdatedesc() {
	document.getElementById("usersort").value = "6";
	document.forms['search_form'].submit();
}
function relationdesc() {
	document.getElementById("usersort").value = "0";
	document.forms['search_form'].submit();
}