javascript - I have a "onclick" that runs 3 functions but only runs one? -

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so have button onclick runs 3 functions , each function display random symbol. when press button, should output 3 random symbols, 1 symbol outputted when click button.

<!doctype html> <html> <head> <title>myfirstjavascript</title> </head> <body> <script>  function slots1() {     var slot1 = math.floor(math.random()*4);     if (slot1 == 0) {         document.getelementbyid('value').innerhtml = "\u2663";     }     if (slot1 == 1) {         document.getelementbyid('value').innerhtml = "\u2665";     }     if (slot1 == 2) {         document.getelementbyid('value').innerhtml = "\u2666";     }     if (slot1 == 3) {         document.getelementbyid('value').innerhtml = "\u2660";     }  }    function slots2() {     var slot2 = math.floor(math.random()*4);     if (slot2 == 0) {         document.getelementbyid('value').innerhtml = "\u2663";     }     if (slot2 == 1) {         document.getelementbyid('value').innerhtml = "\u2665";     }     if (slot2 == 2) {         document.getelementbyid('value').innerhtml = "\u2666";     }     if (slot2 == 3) {         document.getelementbyid('value').innerhtml = "\u2660";     }  }    function slots3() {     var slot3 = math.floor(math.random()*4);     if (slot3 == 0) {         document.getelementbyid('value').innerhtml = "\u2663";     }     if (slot3 == 1) {         document.getelementbyid('value').innerhtml = "\u2665";     }     if (slot3 == 2) {         document.getelementbyid('value').innerhtml = "\u2666";     }     if (slot3 == 3) {         document.getelementbyid('value').innerhtml = "\u2660";     }  }    </script>  <button type="button" value="spin" name="spin"     onclick="slots1();slots2();slots3();">spin</button> <span id="value"></span> </body> </html>

each function overrides value that's changed previous one, value see result of slots3(). following line common functions , it's override:

document.getelementbyid('value').innerhtml = //some value;

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