Answer:

// Checks for display:[none|block], ignores visible:[true|false]
$(element).is(":visible"); 

var myObject = {
    "ircEvent": "PRIVMSG",
    "method": "newURI",
    "regex": "^http://.*"
};

var myObject = {
    "ircEvent": "PRIVMSG",
    "method": "newURI"
};

delete myObject.regex;
// or,
delete myObject['regex'];
// or,
var prop = "regex";
delete myObject[prop];

// Check #x



$( "#x" ).prop( "checked", true );



 



// Uncheck #x



$( "#x" ).prop( "checked", false );

var myVar;

function myFunction() {
    myVar = setTimeout(function(){ alert("Hello"); }, 3000);
}

function myStopFunction() {
    clearTimeout(myVar);
}