function RestrictOnlyNumericDigits() { var key = window.event.keyCode; if (key > 47 && key < 58) return; else window.event.returnValue = null; } function RestrictOnlyAlphabets() { var key = window.event.keyCode; if ((key > 64 && key < 91) || (key > 96 && key < 123) || key == 32 || key == 35) return; else window.event.returnValue = null; } function RestrictOnlyAlphaNumeric() { var key = window.event.keyCode; if ((key > 47 && key < 58) || (key > 64 && key < 91) || (key > 96 && key < 123) || key == 32 || key == 45 || key == 35) return; else window.event.returnValue = null; }