jquery input number validator
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$.fn.numeral = function() { | |
this.bind("keydown", | |
function(e) { | |
// Allow: backspace, delete, tab, escape and enter | |
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110]) !== -1 || | |
// Allow: Ctrl+A, Command+A | |
(e.keyCode == 65 && (e.ctrlKey === true || e.metaKey === true)) || | |
// Allow: home, end, left, right, down, up | |
(e.keyCode >= 35 && e.keyCode <= 40)) { | |
// let it happen, don't do anything | |
return; | |
} | |
// Ensure that it is a number and stop the keypress | |
if ((e.shiftKey || (e.keyCode < 48 || (e.keyCode > 57 && e.keyCode != 189 && e.keyCode != 190))) && (e.keyCode < 96 || e.keyCode > 105)) { | |
e.preventDefault(); | |
} | |
// 如果使用者輸入-,先判斷現在的值有沒有-,如果有,就不允許輸入 | |
if (e.keyCode == 189 && /-/g.test(this.value)) { | |
e.preventDefault(); | |
} | |
// 如果使用者輸入.,先判斷現在的值有沒有.,如果有,就不允許輸入 | |
if (e.keyCode == 190 && /\./g.test(this.value)) { | |
e.preventDefault(); | |
} | |
}); | |
this.bind("keyup", | |
function() { | |
if (/[^0-9\.-]/g.test(this.value)) { | |
this.value = this.value.replace(/[^0-9\.-]/g, ''); | |
} | |
if (/-/g.test(this.value) && !/^-/g.test(this.value)) { | |
this.value = this.value.replace(/-/g, ''); | |
} | |
}); | |
}; |
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