Passing Variables not working

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derekjackson

Hi, this is probably quite a basic one, but I'm struggling to get an argument passed in to a function successfully.

When I do this, the code doesn't execute:

document.onclick = newTarg(5);
document.ondblclick = newTarg(10);

function newTarg(spd) {
	alert('Working = '+spd);
       // More code here
}

Doing this instead works fine:

document.onclick = newTarg;

function newTarg() {
	alert('Working');
       // More code here
}

Any ideas why it won't let me pass a variable in? I've never really formally learnt Javascript so this is getting a bit frustrating...

Padonak

document.onclick = function(){newTarg(5);}
document.ondblclick = function(){newTarg(10);}

derekjackson

Excellent, thanks

Padonak

anytime ))

derekjackson

Just to help me learn(!), why did that work?

Seems weird that it happily called newTarg, but only until I needed to pass a value in to it...

Padonak

my english is not good enough for explaining, just take a look at this article (DOM element properties, DOM Event interface) or try to find smth alike to read in english

007Julien

With a document.onclick you affect a function, not a function call, on the onclick event !