Explaination of javascript e.g: nest=(!nest) ? "":

[dijo123]

What does this function return?
What does the first row mean, would you explain what nest will have for value. I don't understand the ?"":

Thank you for helping me!

function makeMenu(obj,nest){
nest=(!nest) ? "":'document.'+nest+'.';
this.css= bw.dom? document.getElementById obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+"document.layers." +obj):0;

this.elm= bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;

this.ref= bw.dom || bw.ie4? document:bw.ns4?eval(nest+"document.layers." +obj+".document&quot:0;

this.x= bw.ns4?this.css.left:bw.opera5?this.css.pixelLeft:this.elm.offsetLeft;
this.y= bw.ns4?this.css.top:bw.opera5?this.css.pixelTop:this.elm.offsetTop;
this.height= defHeight;//bw.ns4?this.ref.height:bw.opera5?this.css.pixelHeight:this.elm.offsetHeight;
this.status= 0;
return this;
}

 

[simonchristieis]

this is like another simple if else statement

if the variable = value then use the first argument, if not then use the second

eg

var mySum=2
mySum = 2? myVal="two":myVal="No It Doesn't";

alert(myVal)
would alert "two"

Hope this helps

Simon