SelectInputText.js

// Select text inside an input field on user click or focus
// http://jquery-howto.blogspot.com/2009/04/select-text-in-input-box-on-user-select.html

$("#myInputField").focus(function(){
    // Select input field contents
    this.select();
});

// Add this behavior to all text fields
$("input[type=text]").focus(function(){
    // Select field contents
    this.select();
});

// Selects all text content of textareas if and only if it’s value has changed from the original one
$("textarea").focus(function(){
    // Check for the change
    if(this.value == this.defaultValue){
        this.select();
    }
});