Does Javascript has the strlen()?

[jxiong]

Hi all,

I have an onChange then call a function, but inside of my
function I would like to know whether the variable is blank.

Here is the sample code:

OnChange="assignValue(2,this.options[this.selectedIndex].text)"

...

function assignValue(opt, myString)
{
//HOW do I check to see if myString is blank and/or has
// 0 length?

}

Thanks in advance for the help.

Jay

[filburt1]

AFAIK it's just like Java for this one:

if (myString.length() > 0)
{
    alert("w00t!");
}
else
{
    alert("bad! BAD!");
}

[jxiong]

Hi Filburt1,

You were correct, but it would not work with the
myString.length(). However, it works fine with
if (myString.length > 0)

Thanks for the help.

Jay

[Vincent Puglia]

Hi,

'length' in javascript is not a method/function, but a property of every element.

You can also check like this:

if (myString == "") alert('it is blank')

or if you are into functions, define one:

function isEmpty(strVar)
{
return (strVar == "")
}

or:

function strlen(strVar)
{
return(strVar.length)
}
alert((strlen('') == 0))
alert(strlen(''))
alert(strlen('a'))

Vinny