Tips for using JS to operate page tables and elements

(1)
The operations on table labels vary with ie, firefox, and other browsers. in ie, assigning values to innerHTML of table and tr is not allowed. When adding a tr using js, the appendChile method does not work. The following is my test results for the three browsers:

InsertRow

IE6: supported, and the default parameter is-1. It is added to the end by default.

FireFox: supported, but the default parameters are supported.

Opera: supported. default parameters are supported. It is added to the beginning by default.


AppendChild

IE6: not supported

FireFox: Yes, but adding TR does not affect ROWS.

Opera: supported. The effect is the same as that of insertRow (-1), which affects ROWS.

By following the specifications to the maximum extent, you can write safe and applicable code:

// Append an empty row to the table:
Var otr = otable. insertRow (-1 );
Var otd = document. createElement ("td ");
Otd. innerHTML = "";
Otd. className = "XXXX ";
Otr. appendChild (otd );

In this way, you can run on these three browsers.
(3) childNodes operations
(1) attribute nodeName
Utils. getChildrenByTagName = function (node, tagName ){
Var ln = node. childNodes. length;
Var arr = [];
For (var z = 0; z <ln; z ++ ){
If (node. childNodes [z]. nodeName = tagName ){
Arr. push (node. childNodes [z]);
}
}
Return arr;
};
(2) Property id
Function getNodeID (parent, id ){
Var ln = parent. childNodes. length;
For (var z = 0; z <ln; z ++ ){
If (parent. childNodes [z]. id = id ){
Return parent. childNodes [z];
}
}
Return null;
}
(3) attribute className
Corresponding class, such as <tr class = "class1">
Function getElementsByClassName (node, className ){
Var children = node. getElementsByTagName ("*");
Var elements = new Array ();
For (var I = 0; I <children. length; I ++ ){
Var child = children [I];
Var classNames = child. className. split ("");
For (var j = 0; j <classNames. length; j ++ ){
If (classNames [j] = className ){
Elements. push (child );
Break;
}
}
}
Return elements;
}