function submit_filter(){
		
	   // the variables below are assigned to each
	   // form input
	   var ns, cat, gcat1, gcat5, gcat6, gcat7, gcat8, gsq;
	   
	   with(window.document.filterform){
		  gsq   = sq;
		  gcat1    = cat1;
		  gcat5    = cat5;
		  gcat6   = cat6;
		  gcat7 = cat7;
		  gcat8 = cat8

	   }
	   
	   if(gsq.value != '' && gsq.value != 'Search' && gsq.value != 'Search (optional)'){
		   
		   query =  gsq.value;
				   
		   window.location = "http://www.pop4vocals.com/index.php/repertoire?sq="+query;
		  
	   }else{
		  
	   	   // Lees de waarde van de geselecteerde cat1 radio button
		   for (index=0; index < document.filterform.cat1.length; index++) {
				if (document.filterform.cat1[index].checked) {
					var gcat1 = document.filterform.cat1[index].value;
					break;
				}
			}
			ns = '';
		 
		   if(gcat1 == '2'){
			   ns = 'ns=true';
		   }
	
		   cat = '';
		   
		   if(gcat1 == '8'){
			   cat += '-7,';
		   }
		   if(gcat1 == '7'){
			   cat += '-8,';
		   }
		   
		   if(gcat5.checked == '0'){
			  cat += '3,'; 
		   }
		   if(gcat6.checked == '0'){
			  cat += '4,'; 
		   }
		   if(gcat7.checked == '0'){
			  cat += '5,'; 
		   }
		   if(gcat8.checked == '0'){
			  cat += '6,'; 
		   }
				   
		   if(cat != ''){
			  cat = cat.slice(0, -1)
			  cat = '?cat='+cat;     ///& wijzigen in ?
				  if(ns != ''){
					  cat = cat+'&';
				  }
		   }else{
			  cat = '?';   ///& wijzigen in ?
		   }
		   
		   if(gcat5.checked != '0' && gcat6.checked != '0' && gcat7.checked != '0' && gcat8.checked != '0'){
				alert('Select voices');   
		   }else{
				window.location = "http://www.pop4vocals.com/index.php/repertoire"+cat+ns;
		   }
	   
	   }
}

function submit_search(){
	
	   
		
	   // the variables below are assigned to each
	   // form input
	   var gartist, gtitle, gsq, mode, query, query;
		
	   with(window.document.searchform){
		  gartist    = artist;
		  gtitle    = title;
		  gsq   = sq;
		  
	   }
	   
	   	   
	   mode = '';
	   	   
	   if(gartist.checked == '0'){
		  mode += 'a'; 
	   }
	   if(gtitle.checked == '0'){
		  mode += 't'; 
	   }
	   if(gsq.value != ''){
		  query =  gsq.value;
	   }else{
		  alert('empty search');

	   }
	   
	   	   	   
	   if(mode == ''){
		  mode='at';
	   }	   
	   
	   
	   window.location = "http://www.pop4vocals.com/index.php/repertoire?sq="+query+"&mode="+mode;
	
}