I have this code and in Internet Explorer have a problem.

I need block just special caracter(my regex), in Chrome, Opera and Mozilla It's OK, but in the IE It block all key.

2. <script type="text/javascript">
3.      function regexAlfanumerito(event) {
4. var regex = new RegExp("[\sa-zA-Z0-9çÇáéíóúýÁÉÍÓÚÝàèìòùÀÈÌÒÙãõñäëïöüÿÄËÏÖÜÃÕÑâêîôûÂÊÎÔÛ]+");
5. if ((event.keyCode != 9) && (event.keyCode != 8) && (event.keyCode != 32)) { 
6.     var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
7. if (!regex.test(key)) {
8. if(event.preventDefault){
9. event.preventDefault();
10. return false;
11. }else{
12. event.returnValue = false; 
13. };
14. }
15. }
16. }
17. </script>