<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
$("#amoutField").on("keypress keyup", function(e) {
var keyCode = (e.keyCode ? e.keyCode : e.which);
if (keyCode === 48 ){
e.preventDefault();
}
});
<!-- language: lang-html -->
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
var myJSONObject = {"ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*"};
delete myJSONObject.regex;
console.log ( myJSONObject.regex); // logs: undefined
<!-- end snippet -->
This works in Firefox and Internet Explorer, and I think it works in all others.
