Simple and foldable two-level tree menu with JS _ javascript skills

You may not be familiar with the foldable tree menu. There are many implementation methods. In this article, we will introduce how Javascript is implemented and hope to help you. The Code is as follows:

Foldable two-level menu




Window. onload = function (){
VarlistUL = document. getElementById ("listUL ");
Varolist = listUL. childNodes;
Varoa = 0;
For (var I = 0; I <olist. length; I ++ ){
If (olist [I]. tagName = "LI" & olist [I]. getElementsByTagName ("ul") [0]) {
Oa = olist [I];
Oa. onclick = change;
}

}
Functionchange (){
Varos = this. getElementsByTagName ("ul") [0];
If (OS. className = "myHide ")
OS. className = "myShow ";
Else
OS. className = "myHide ";
}
}
Script

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