Hi,
can you try like below.
if (text == "header") {
var newimgeUrl = imgeUrl.split("!");
autoList.childNodes[i].innerHTML = "<div onclick='return div_click();' style="width:380px;height:30px;background-color:#80BA27;padding:5px;color:black;font-size:16px;text-align:center">Static Heading</div>";
}
javascript function.
function div_click()
{
document.getElementByID('TextBox1').value = '';
return false;
}
hope it helps.