What does "member not found" error mean?

[andersond]

I want input objects to have a light yellow background when they have focus. Here's how I call my function:

input name="monthsVacant" id="monthsVacant" disabled="disabled" onFocus="yellowOn('monthsVacant')"
 

And here's my function.

function yellowOn(vObject){
 var vObject; //object being highlighted
 document.getElementById(vObject).style="background-color:#FFFFCC";
} 
 

When the object gets focus I get an error message that says "member not found". What is it talking about? And how can I get this to work?

[Dormilich]

you are overwriting the function's argument, omit line #2. further, the background colour in JS can be accessed by style.backgroundColor.

nevertheless, a much easier approach would be using the this keyword:

function myfunction()
{
  this.style.color = "red";
}

[andersond]

function yellowOn(vObject){ 
document.getElementById(vObject).style="background-color:#FFFFCC"; 
} 
 

which results in "member not found"

and

function yellowOn(vObject){ 
document.getElementById(vObject).style.backgroundcolor="#FFFFCC"; 
} 
 

which results in nothing at all

[Dormilich]

@andersond
JS is case sensitive, the property is called "backgroundColor"