// JavaScript Document
function sorteren(element_id) {
	var strHref = window.location.href;
	keuze = document.getElementById(element_id).value;
	//alert(strHref); //geeft url
	//window.location.href = strHref + '&sort=' + keuze;
	
	pag = 0;
	soort = get_url_parameter('soort');
	window.location.href = "merchandise_overzicht.php?pag=" + pag + "&soort=" + soort + "&sort=" + keuze;
}

function get_url_parameter(param) {
	param = param.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
	var regexS = "[\\?&]"+param+"=([^&#]*)";
	var regex = new RegExp( regexS );
	var results = regex.exec( window.location.href );
  	if( results == null )    
  		return "";  
  	else    
  		return results[1];
}