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Js has better aproach to Null management that VB in general lines... usually you cant evaluate a null value in VB, however, in Js a Null value can be evaluated to False without getting errors, this is because in Js all that is not True is always False, as Null can't be True it's automatically set to False when evaluated.<br />
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Also you can use a statement like (object == null) if you are not used to evaluate directly an object
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Js has better aproach to Null management that VB in general lines... usually you cant evaluate a null value in VB, however, in Js a Null value can be evaluated to False without getting errors, this is because in Js all that is not True is always False, as Null can't be True it's automatically set to False when evaluated.

Also you can use a statement like (object == null) if you are not used to evaluate directly an object

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thanks<br />
wasnt sure exactly what you meant<br />
i landed up using the length which seemed to help.<br />
<br />
should that give the same indication?
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thanks
wasnt sure exactly what you meant
i landed up using the length which seemed to help.

should that give the same indication?

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hey folks<br />
<br />
i usually code in VBscript and use IsNull - i understand the function does not exist in Jscript. what can be used instead?<br />
<br />
(i am checking a database value - but its a general question too)<br />
<br />
thanks!
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hey folks

i usually code in VBscript and use IsNull - i understand the function does not exist in Jscript. what can be used instead?

(i am checking a database value - but its a general question too)

thanks!

IsNull equivalent in ASP/jScript

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.

JScript is Microsoft's dialect of the ECMAScript standard that is used in Microsoft's Internet Explorer. JScript is implemented as an Active Scripting engine, so it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages, and Windows Script Host. It also means such applications can use multiple Active Scripting languages, e.g., JScript, VBScript or PerlScript.