jQuery call function from a string [duplicate]

Answer 1

In my case I needed to get the value from a rel attribute and then parse it as a function, this worked for me.

$jq('#mainbody form').submit(function(e){
    var formcheck = $jq(this).attr('rel');
    if (typeof window[formcheck] === 'function'){
        formok = window[formcheck]();
        e.preventDefault();
    }
});
function maincheck(){
    alert("Checked");
    return false;
}

and the form

Field 1 

Field 2