IE5.5 SP2 (ver IE 5.50.4807.2300. co) not recognizing 'undefined' as keyword

[udieee]

Hi,

When I run the following function in IE5.5 with SP2 (version 5.50.4807.2300. co ) I get the javascript error for 'undefined''

function checkParam(url, paramName, paramValue)
{
if(paramName!=u ndefined && paramValue!=und efined &&
paramName!=null && paramValue!=nul l &&
paramName.lengt h==paramValue.l ength)
{
// Do processing
}
}

However when the code is modified to use 'undefined' in forllowing manner it works
typeof(paramNam e) !="undefined"

This function is called as checkParam(<som eurl>);

From the web I could find that 'undefined' is supported from Javascript1.2 onwards.

My question:
Where can I get the information about the JavaScript version supported by IE5.5 (version 5.50.4807.2300. co). I don't have access to this browser to check the information. I need to substantiate it with pointers to sites mentioning this information.

TIA,
Udie

[shoonya]

how about using

 
var arg;
if(arg){  // if arg is defined
}

shoonya

[acoder]

Unfortunately, IE doesn't use Javascript. It uses JScript which is its own proprietary version of standard Javascript.