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JavaScript

var catalogueHrefRegex = /\/automobiles\/((cr)|(ts$)|(zs)|(ax)|(wx))$/;

var href = "xxx/compare/ax?model=xxx";
var href2 = "xxx/compare/cr?model=xxx";

if( catalogueHrefRegex.test(href) ) {
   alert('true');
} else {
    alert('false');
}

if( catalogueHrefRegex.test(href2) ) {
   alert('true');
} else {
    alert('false');
}