// This function is called when textbox is resizing.
function OnClientResizeText(sender, eventArgs) {
    var element = sender.get_element();
    var textBox;

    // Iteration required becuase different browser renders element in different way, 
    // TEXTAREA is childNodes[2] in IE and childNodes[3] in FF/Netscape/Safari/Opera
    for (index = 0; index < element.childNodes.length; index++) {
        if (element.childNodes[index].nodeName.toLowerCase() == "textarea") {
            // Assigning correct TEXTAREA element reference in textBox onject.
            textBox = element.childNodes[index];
            break;
        }
    }
    textBox.style.height = element.style.height;
    textBox.style.width = element.style.width;
    return false;
}