You can achieve the above output, when you do below Customization:
/* Code To Add a Button to form Associated View Grid */
/* function call on click of the dynamically Created Button */
function AlertMe() {
alert("Hi...");
}
/* Code Responsible to achieve the above requirement */
var loadArea2 = loadArea;
loadArea = function (area) {
loadArea2(area);
if (area == "new_account_new_accountasset") {
document.getElementById("new_account_new_accountassetFrame").src = document.getElementById("new_account_new_accountassetFrame").src;
var iframe = document.getElementById("new_account_new_accountassetFrame");
iframe.onreadystatechange = function () {
if (iframe.readyState == 'complete') {
if (iframe.contentWindow.window.document.getElementById('MBcrmGridDisplayInactive') == null) {
var li = document.createElement("li");
li.id = "_MBcrmGridDisplayInactive";
li.className = "ms-crm-Menu";
li.title = "Display Inactive";
li.tabIndex = -1;
li.onclick = function () { AlertMe(); }
li.innerHTML = "<SPAN class='ms-crm-Menu-Label'>" +
"<IMG class=ms-crm-Menu-ButtonFirst tabIndex=-1 alt='DisplayInactiveAssets' src='/ITSolutions/_Common/icon.aspx?objectTypeCode=10000&iconType=GridIcon&inProduction=1&cache=1'>" +
"<SPAN id='titlespan' class=ms-crm-MenuItem-TextRTL tabIndex=0>Display Inactive Assets</SPAN>" +
"</A>" +
"</SPAN>";
var ele = iframe.contentWindow.window.document.getElementsByTagName("ul");
for (i = 0; i < ele.length; i++) {
if (ele[i].className == "ms-crm-MenuBar-Left") {
ele[i].appendChild(li);
break;
}
}
}
}
}
}
}