question about pop-up menu

HI everyone
My question is like that
this is the code:

<script language="javascript">
function showHideTable(menuId){
var obj=document.getElementById(menuId)
obj.style.visibility=(obj.style.visibility=="visible"?"hidden":"visible")
}
</script>

I need three things:
1 can someone put this code into reguler if/else and make it more simple for me?
2 what is this syntax with "? :" means?
3 why do i need this function to a pop-up menu?



looking fror hearing from all of u guys

progfrog

 

I'll answer question 1 & 2 for you.

<script language="javascript">
function showHideTable(menuId){
    var obj=document.getElementById(menuId)
    if (obj.style.visibility == "visible"){
        obj.style.visibility = "hidden";
    } else {
        obj.style.visibility = "visible";
    }
}
</script> 

Code (markup):

That's your function re-written for IF/ELSE.

(obj.style.visibility=="visible"?"hidden":"visible")

Code (markup):

Means set if obj.style.visibility is visible, return hidden, otherwise return visible.

Sorry if that's bit confusing. It means exactly what the IF/ELSE statement does above.

Jay