var a="24/05/2013";
var b="26/05/2013";

function dateCheck() {
    var fDate = new Date("24/05/2013");
    var lDate; = new Date("26/05/2013");
    fDate = Date.parse(document.getElementById("fDate").value);
    lDate = Date.parse(document.getElementById("lDate").value);

    if(fDate <= lDate) {
        alert("true");
        return true;
    }
    alert("false");
    return false;
}

function dateCheck() {
    var a = new Date("24/05/2013");
    var b = new Date("26/05/2013");
    var checkinDate = Date.parse(document.getElementById("checkinDate").value);
    var checkoutDate = Date.parse(document.getElementById("checkoutDate").value);

    return((checkinDate >= a && checkinDate <= b) &&
       (checkoutDate <= b && checkoutDate >= a) &&
       (checkoutDate > checkinDate))
}

function dateCheck() {
        var a = new Date("24/05/2013");
        var b = new Date("26/05/2013");
        var checkinDate = Date.parse(document.getElementById("checkinDate").value);
        var checkoutDate = Date.parse(document.getElementById("checkoutDate").value);

        return(( a > checkinDate && a < checkoutDate) &&
           (b < checkoutDate && b > checkinDate) &&
           (checkoutDate > checkinDate))
    }

var fdt= new Date("20/02/2013");
    var tdt = new Date("10/05/2013");

function validateFromAndToDate(fdt,tdt){

    var dt1  = dte1.value.substring(0,2);
    var mon1 = dte1.value.substring(3,5);
    var yr1  =dte1.value.substring(6,10);

    var dt2  = dte2.value.substring(0,2);
    var mon2 = dte2.value.substring(3,5);
    var yr2  = dte2.value.substring(6,10);
    var date1 = new Date(yr1, mon1-1, dt1);
    var date2 = new Date(yr2, mon2-1, dt2);

        if (date2<date1){
            alert("Date period must be within the given date!");
            return false
        }
    return true
 }