function num(e)//this function is only allow the character [a-z]/[A-Z]
    {
        var k;
        document.all ? k =e.keyCode : k = e.which;
        return ((k > 64 && k < 91) || (k > 96 && k < 123));
    }

function numberonly(e)//this function is use only for Number
    {
        var k;
        document.all ? k =e.keyCode : k = e.which;
        return (k > 47 && k < 58);
    }
function alpah(e)// this function is used for both character and number
    {
        var k;
        document.all ? k =e.keyCode : k = e.which;
        return((k >64 && k<91) || (k>96 && k<123) ||(k > 47 && k < 58)||)
    }