Uncaught TypeError: Cannot set property 'onclick' of null [duplicate]

Answer 1

window.onload() didn't solve my problem so i had to write code to wait for the element to get loaded. You can do something like this:

function waitForLoad(id, callback){
    var timer = setInterval(function(){
        if(document.getElementById(id)){
            clearInterval(timer);
            callback();
        }
    }, 100);
}

waitForLoad("subm", function(){
    console.log("load successful, you can proceed!!");
    document.getElementById("subm").onclick = function()
    {
        alert("I got clicked");
    }
});