javascript setTimeout() passes function parameters (including passing object parameters)_javascript skills

So, I searched online and used another writing method setTimeout("fun(" parameter ")", 1000), but it still didn't work. However, the above writing method is OK when passing the textarea of ​​the form form. For example, hml is like this:

Copy code The code is as follows:

In js I can write like this:
setTimeout("doAjax(document. sform.txtara.value )", 1000);
But once you want to pass other parameters or object parameters, you have to rewrite this function according to the methods provided on the Internet.
After research and practice, I have improved the method myself. You can refer to it. I only base it on my personal needs. I cannot guarantee other situations. Please give me your advice!

Copy code The code is as follows:

JavaScript:

Copy code The code is as follows:

function initAjax() {
var httprequest=null;
try {
httprequest =new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
httprequest=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {
try {
httprequest=new XMLHttpRequest();
}
catch (e) {
httprequest=null;
}
}
}
return httprequest;
}
function doAjax( msg, obj ) {
var obj=obj; // Mainly this line
alert( obj.value);
var he="he=" msg;
var ajaxrequest=initAjax();
ajaxrequest.open("POST", "abc.jsp", true);
ajaxrequest.setRequestHeader( "Content-Type" , "application/x-www-form-urlencoded;charset=utf-8");
ajaxrequest.send(he);
ajaxrequest.onreadystatechange=function() {
if (ajaxrequest.readyState= =4) {
if (ajaxrequest.status==200) {
document.getElementById("showpane").innerHTML=ajaxrequest.responseText;
}
else {
doAjax( msg );
}
}
}
setTimeout("doAjax(document.sform.txtara.value,document.all[" obj.sourceIndex "])", 100);//Also This line
}

In this way, I solved the problem of object parameter passing. Finally, I would like to say that if you have a better solution, please leave a comment. I am happy to cooperate with like-minded people. study!