js mask progress bar (combined with pictures)_javascript skills

/********************
** js mask progress bar (picture)
** dingzh@jstrd.com
** 2009-12- 03
*************************/

/ /Disable webpage back
window.history.forward(1);
document.attachEvent("onkeydown",docKeyDown);
function docKeyDown() {
//Shield the backspace delete key
if (window.event.keyCode == 8) {
if(window.event.srcElement.type != "text"
&& window.event.srcElement.type != "textarea"
&& window.event.srcElement.type != "password") {
window.event.keyCode = 0x0;
return false;
} else if(window.event.srcElement.readOnly) {
window.event.keyCode = 0x0;
return false;
}
}
}


//Loading progress bar
var process_submit_doing = false;
try {
window.attachEvent("onload",doBodyLoad);
//document.attachEvent("onclick",doProcess);
window.attachEvent("onbeforeunload",doWinLoad);
} catch(e) {
document.addEventListener("onclick",doProcess,false);
window.addEventListener("onbeforeunload",doWinLoad,false);
}
//
function doBodyLoad() {
var obj;
var vInput=document.getElementsByTagName("INPUT");
for(var i in vInput) {
obj=vInput[i];
if(obj.type=="button" || obj.type=="submit") {
obj.attachEvent("onclick",doProcess);
}
}
vInput=document .getElementsByTagName("IMG");
for(var i in vInput) {
obj=vInput[i];
if(undefined != obj.alt) {
obj.attachEvent(" onclick",doProcess);
}
}
}
//
function doWinLoad() {
process_submit_doing = true;
}
//
function doProcess() {
//Whether it is being submitted
if(!process_submit_doing) {
return;
}
//
var showProcess = false;
//Capture Event source
var eventObj = event.srcElement;
var btnvalue = "";
if(eventObj.tagName=='INPUT') {
btnvalue = eventObj.value;
} else if(eventObj.tagName=='IMG') {
if(null != eventObj.alt && "" != eventObj.alt) {
btnvalue = eventObj.alt;
} else {
btnvalue = eventObj.title;
}
}
btnvalue = btnvalue.replace(/ */g,"").replace(/ */g,"");
//
var my_array = new Array();
my_array.unshift("Submit", "Confirm", "Save", "Temporary", "Checkout", "Review", "Approval", "Void", "Return", "Return", "Reject",
"Refund", "Cancel", "Import", "Accept", "Handle", "Process", "Query", "Storage", "Incoming account", "Outgoing account", "Outgoing account");

for (i = 0; i < my_array.length; i ) {
if(new RegExp(my_array[i], "ig").test(btnvalue)) {
showProcess = true;
break;
}
}

//alert(showProcess);
//No Show progress bar
if(!showProcess) {
return;
}
//
createProcessBgDiv();
}


function nocontextmenu()
{
event.cancelBubble = true
event.returnValue = false;
return false;
}
function norightclick()
{
if (event.button == 2 || event.button == 3)
{
event.cancelBubble = true
event.returnValue = false;
return false;
}
}

//Page mask
function createProcessBgDiv()
{
var h=document.body.scrollHeight;
var w=document.body.scrollWidth;
var div=document .createElement("");
//div.appendChild(document.createTextNode("xxxxxxxxxxxxxxxxxxxxxxxx"));
div.appendChild (document.createElement(""));
document.body.appendChild(div) ;
document.body.appendChild(document.createElement(""));

//Shield the right mouse button
document.oncontextmenu = nocontextmenu; // for IE5
document.onmousedown = norightclick; // for all others
}
/*function delProcessBgDiv()
{
document.body.removeChild( document.getElementById("divProcessBg"));
document.onmousedown = null;
} */