if (res == 1) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/gelderland1.css\" type=\"text/css\">"); }
else if (res == 2) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/gelderland2.css\" type=\"text/css\">"); }
else if (res == 3) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/gelderland3.css\" type=\"text/css\">"); }
else if (res == 4) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/gelderland4.css\" type=\"text/css\">"); }
else if (res == 5) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/gelderland5.css\" type=\"text/css\">"); }