Simple javascript can't figure out where it's wrong -


i can't figure out went wrong simple javascript

<!doctype html> <html> <head> <title> </title> <script>    function changecolor() {         var elem = document.getelementbyid("para1");         if (elem.style.color == black) {             elem.style.color = blue         }         else if (elem.style.color == blue) {             elem.style.color = red         }         else if (elem.style.color == red) {             elem.style.color = black         }     }     </script> </head>  <body>     <p id="para1"> text here</p>     <button onclick='changecolor();'>change!</button>     <!-- <button onclick='changecolor("red");'>red</button> --> </body> </html>

realise debugging harder javascript vba - i'm used it.

you're missing quotes around color values.

elem.style.color = 'red';

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