JavaScript overwrites the document. createElement Method to Solve the Problem of incompatibility between window. close and Firefox)

Recently encountered a problem in the project, there is a asp.net web program can only run in IE7, now xp are eliminated, everyone uses IE8-IE11, so this web app also needs to upgrade to adapt to all IE versions. According to the incompatibility of IE, the document. createElement method is called, for example:

Function addStyleNo (value, cannotDel ){
If (! Value ){
Value = '';
}
Var tb = $ ('tbodystyle ');
Var tr = tb. insertRow ();
Var td1 = tr. insertCell ();
Td1.style. width = '20px ';
Td1.style. height = '20px ';
If (! CannotDel ){
Var imgDel = document. createElement (" ");
Td1.appendChild (imgDel );
}

Var td2 = tr. insertCell ();
Td2.style. height = '20px ';
Var txt = document. createElement ("<input type = 'text' class = 'IP-bx-ro 'value ='" + value + "'/> ");
Td2.appendChild (txt );

}

There are too many js files in this system, and you are not familiar with the business of this system. I used to replace this document. createElement with jquery,

Var imgDel = jq (" ") [0];

Var txt = jq ("<input type = 'text' class = 'IP-bx-ro' value = '" + value + "'/>") [0];

Later I found that there were too many places to change. So think about whether there is a simple method, and finally point the finger to overwrite the implementation of the document. createElement method.

Document. createEl = document. createElement;
Document. createElement = function (obj ){
If (obj. toString (). indexOf ("<")>-1 ){
Return jq (obj) [0];
}
Else {
Return document. createEl (obj );
}
}

No exceptions have been found in ie.

All those familiar with the front-end know that Firefox's non-window. open page window. close by default is invalid.

Many people on the Internet say that they enter "about: config" in the address bar of Firefox and find dom. allow_scripts_to_close_windows; Change "false" to "true ".

Looking at these people's opinions, I have to say that I am suffering.

I am working on a website. How can I modify the user's browser settings? I am not a virus.

Do I publish an announcement on my website: "If you need Firefox to access this website, please modify the browser settings ......"

I'm afraid I will die very quickly.

It is impossible to close it, so let's make a compromise .. Jump to about: blank

 <script type="text/javascript">        function CloseWebPage() {            if (navigator.userAgent.indexOf("MSIE") > 0) {                if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {                    window.opener = null; window.close();                }                else {                    window.open('', '_top'); window.top.close();                }            }            else if (navigator.userAgent.indexOf("Firefox") > 0) {                window.location.href = 'about:blank ';                //window.history.go(-2);            }            else {                window.opener = null;                 window.open('', '_self', '');                window.close();            }        }    </script>