Edit in JSFiddle

var serverToday = new Date(2013, 3, 11);
$.datepicker.setDefaults({
        showAnim: "fold",
        showOn: "both",
        showButtonPanel: true,
        currentText: "Current Month",
        closeText: "Close",
        buttonText: "Choose a Date",
        buttonImage: "/images/calendar_w25xh24.jpg",
        buttonImageOnly: true,
        defaultDate: "+1w",
        changeMonth: true,
        changeYear: true,
        firstDay: 0 //Set the first day of the week: Sunday is 0, Monday is 1
 });
$(function() {
    $( "#datepicker" ).datepicker({
        minDate: serverToday
    });

});

$(function() {
    $( "#from" ).datepicker({
        maxDate: serverToday,
        onClose: function( selectedDate ) {
            $( "#to" ).datepicker( "option", "minDate", selectedDate );
        }
    });
    $( "#to" ).datepicker({
        maxDate: serverToday,
        onClose: function( selectedDate ) {
            $( "#from" ).datepicker( "option", "maxDate", selectedDate );
        }
    });
}); 

<p >Date: <input type="text" id="datepicker" /></p>
<p><label for="from">From:</label><input type="text" id="from" name="from" />
<label for="to" style="margin-left:20px;">To:</label><input type="text" id="to" name="to" /></p>

<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/themes/smoothness/jquery-ui.min.css" rel="stylesheet" />
<style type="text/css">
.ui-datepicker-trigger{
    display:inline;
    margin:0px;
    border:0px solid red;
    padding:0px;
    margin:0px;
    vertical-align:bottom;
    position:relative;
}

div#ui-datepicker-div .ui-datepicker-current-day {
    background-color: #cd0a0a;
}

div#ui-datepicker-div{
    font-family: Tahoma, Verdana, sans-serif; font-size: 14px;
    border: 3px double #566483;
}


.ui-datepicker .ui-datepicker-buttonpane button  {
	float: right;
	margin: .5em .2em .4em;
	cursor: pointer;
	padding: .2em .6em .3em .6em;
	width: auto;
	overflow: visible;
    color:#566483;
    font-size: 12px;

}
.ui-datepicker .ui-datepicker-buttonpane .ui-datepicker-close {
    font-weight:400;    
}
.ui-datepicker .ui-datepicker-buttonpane .ui-datepicker-current {
    font-weight:900;
}
.ui-datepicker-calendar thead, .ui-datepicker-calendar th {
	text-align: center;
	background: #566483;
	color: #FFFFFF;
	font-weight: bold;
    border: 1px solid #CCCCCC;
}
.ui-datepicker-calendar tbody {
    border: 1px solid #CCCCCC;
}
</style>