javascript - If element with ID has as class -


this question has answer here:

what have is

function setmenucurrentto(variable) { document.getelementbyid("game_" + variable).style.display = "block"; var elems = document.getelementsbyclassname("current_nav");  (var i=elems.length; i--;) { elems[i].style.display = "none"; elems[i].classname = 'none'; } document.getelementbyid("game_" + variable).classname="current_nav"; } }

so when click tag specific element(variable) adds content , "hides" one. there bug when click twice in same button, content dissapears , don't have anymore content.

so tried code:

function setmenucurrentto(variable) { document.getelementbyid("game_" + variable).style.display = "block"; if (getelementbyid("game_" + variable).hasclass("current_nav")) { } else { var elems = document.getelementsbyclassname("current_nav");  (var i=elems.length; i--;) { elems[i].style.display = "none"; elems[i].classname = 'none'; } document.getelementbyid("game_" + variable).classname="current_nav"; }

the 

if (getelementbyid("game_" + variable).hasclass("current_nav")) {} else {

make code don't work, content appears no other "hides". problem in code? thank you, i'm new @ javascript, got yesterday original code. thank again.

edit:

i got correct answer: wroniasty

function setmenucurrentto(variable) { document.getelementbyid("game_" + variable).style.display = "block"; if (jquery('#game_' + variable).hasclass('current_nav')) { } else { var elems = document.getelementsbyclassname("current_nav");  (var i=elems.length; i--;) { elems[i].style.display = "none"; elems[i].classname = 'none'; } document.getelementbyid("game_" + variable).classname="current_nav"; } }

getelementbyid returns domnode , there no hasclass method in domnode.

you may want use library, jquery:

jquery('#game_' + variable).hasclass('current_nav')

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