javascript - JScript Check if element exists and remove it -

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i'm trying write simple function in javascript check if element exists in dom , if remove, , if doesn't, append page, far i've got this

        if document.contains(document.getelementbyid("submitbutton") {             document.getelementbyid("submitbutton").remove(); }   else {         lastdiv.appendchild(submitbutton);           }

(lastdiv div want append div 'submitbutton' to) yet i'm getting error "uncaught referenceerror: myfunction not defined"

any help? i'm aware newbie question, sorry that

there syntax error in code, if statements require parens

if (document.contains(document.getelementbyid("submitbutton"))) {             document.getelementbyid("submitbutton").remove(); }   else {         lastdiv.appendchild(submitbutton);   }

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