if (res == 1) {
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else if (res == 2) {
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else if (res == 3) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/ijsselstein3a.css\" type=\"text/css\">"); }
else if (res == 4) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/ijsselstein4a.css\" type=\"text/css\">"); }
else if (res == 5) {
   document.write("<LINK rel=stylesheet href=\"klanten_css/ijsselstein5a.css\" type=\"text/css\">"); }