Empty Text Box Validation Not Working

Question

OnClientClick="return Validate()"

 

 

 

function Validate()

{

console.log("kkkk");

alert("pppp");

var pgng = document.getElementById("ContentPlaceHolder1_txtUsername").value.trim();

alert(pgng=='');

console.log(pgng);

if (document.getElementById("ContentPlaceHolder1_txtUsername").value.trim() == '') {

alert('The textbox should not be empty...');

document.getElementById("ContentPlaceHolder1_txtUsername").focus();

return false;

}

return false;

}