After reading this post I decided to create a input that acts similarly to a disabled input box but was "readonly". 
So I've made it so it wasn't able to be selected or tabbed to, or have a mouse cursor that gave the user the idea they can change or select the value.
Tested on IE8/9, Mozzila 18, Chrome 29
<input name="UserName" class="accountInputDisabled" id="UserName" type="text" readOnly="readonly" value="" unselectable="on" tabindex="-1" onselectstart="return false;" ondragstart="return false;" onmousedown='return false;'/>
input.accountInputDisabled {
    border: 1px solid #BABABA !important;
    background-color: #E5E5E5 !important;    
    color: #000000;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -moz-user-input: disabled;
    -ms-user-select: none;
    cursor:not-allowed;
}
input:focus {
    outline: none;
}