function cancelenter(e) {
    var key;
    if (window.event)
        key = window.event.keyCode;     //IE
    else
        key = e.which;     //firefox
    if (key == 13) {
        if (window.event) {
            window.event.cancel = true;
            window.event.returnValue = false;
        }
        else {
            e.cancel = true;
            e.returnValue = false;
        }
        return false;
    }
}

function isenterkey(e) {
    var key;
    if (window.event)
        key = window.event.keyCode; //IE
    else
        key = e.which; //firefox      

    return (key == 13);
}


function isValidWeight(val) {
    if (val.toString().indexOf(".") == -1)
        return true;
    else if (val.toString().split(".").length <= 2 && (val.toString().split(".")[1] == "0" || val.toString().split(".")[1] == "5" || val.toString().split(".")[1] == ""))
        return true;
    else
        return false;
}