Combine two javascript functions??

[irinapl]

Is it possible to combine two JavaScritpt functions?

I want to "automatically" add a function to all input fields. But origianl function sould also be called.

Example: I have a following field:

<input onchange="alert('hi ')">




Then I want to add a call to

function sayHello(){
alert('hello')
}

The call to function sayHello() will be added from body onload function.

I want both "hi" and "hello" to be displayed.

 

[irinapl]

I found out:

here is the code:

function addOnClickFunction(elem, newFunction){
var orig = elem.onclick;
elem.onclick = function(){
newFunction();
if(orig){
orig();
}
}
}

 

[theniteowl]

You beat me to it.
But of course there is more to the code.
You have to retrive and loop through the collection of form elements and test to see if the particular element is of a type that you want to modify or not. Also you might need to consider if it is always an onclick event you are looking for or if you want to watch for onchange, onkey or onmouse events and modify them rather than just looking for onclick.

It all depends of course on your purpose for doing this but you also might want to intercept hyperlinks to execute your code before changing the page.


At my age I still learn something new every day, but I forget two others.

 

[vbkris]

also look into the DOM way of doing it.
ie attacheEvent (IE) and addEventListener(Firefox browsers)...

Known is handfull, Unknown is worldfull