events onclick
document.getElementById("myBtn").onclick=function(){displayDate()}; function displayDate() { document.getElementById("demo").innerHTML=Date(); } //------------ <button onclick="myFunction()">Click me</button> <p id="demo" onclick="myFunction()">Click me to change my text color.</p> //------------ <input value="Click" onclick="alert('Click')" type="button"> //------------ document.getElementById(id).setAttribute('onclick','myFunction()')