javascript - Change display via click - 


function sg() {     x = document.getelementbyid("cai");     g = x.style.display;     if (g == "none") {         g == "block"     } else {         g == "none"     }; } window.onload = zmena;  function zmena() {     document.getelementbyid("matek").onclick = sg; }

why isnt script working

firstly, can't assign value variable : 'g == "block"' . logical operation, not assignment. secondly, can wrap if else stuff in 1 string using short form, shown below :

function sg() {     x = document.getelementbyid("cai");     x.style.display = x.style.display == 'block' ? 'none' : 'block' }

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