function carregarDocumento() {
    var url = document.getElementById("urlDocumento");
    if ( url != null ) {
        if ( url.value != '' ) {
            document.getElementById("imgDocumento").src = url.value;
            document.getElementById("urlDocumento").value = '';
        }
    }
    document.getElementById("imgDocumento").height = (window.screen.height/window.screen.width)*window.screen.height - 65;	
}