How to Remove Special Characters in JavaScript String

How to Remove Special Characters in JavaScript String 

   var string = string.replace(/[&\/\\#,+()$~%.'":*?<>{}]/g,'_');

   alert("string : "+string);  

Alternatively, to change all characters except numbers and letters, try:

         var string="Air!()*@!||#$%&*&Bhurtan";
         string = string.replace(/[^a-zA-Z0-9]/g,'');  
         alert("string : "+string); 

or

string = string.replace(/[`~!@#$%^&*()_|+\-=?;:'",.<>\{\}\[\]\\\/]/gi,''); 

alert("string : "+string);