How to use the JQuery trim() function into normal Javascript file?

[varunkumarid]

Hi to all

I am using following line code to trim the unwanted space in string on client side whatever the enduser will type into the textbox

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if(document.getElementById("txtUserName").value.trim() == ""){
       ..........
       ..........
}

when this line execute by the browser on clinet side

it shows the error "Object doesn't support this property or method Error"

How to use the trim() function in javascript

Please Help me

Thanks in Advance...

[Dormilich]

I rather suspect you call that before the element is created in the DOM.

PS. you code has nothing to do with jQuery