只好输入数字，汉字等.

调用的时候使用  onkeydown="return  functionName(this,event.keyCode)"

禁止使用粘贴功能 onpaste = "return false;"

浮点型

//只能输入浮点型
function PositiveDoble(element, keyCode)
{
    if (keyCode == 9 || keyCode == 116 || (keyCode >= 35 && keyCode <= 40))
    {
        return true;
    }
    if ($(element).val().length >= 1 && $(element).val() != "-" && $(element).val().toString().lastIndexOf(".") < 0 && keyCode == 110) {
        return true;
    }
    //输入00
    if ($(element).val().length == 1 && $(element).val()=="0" && (keyCode == 96 || keyCode == 48)) {
        return false;
    }
    //输入-0
    if ($(element).val().length == 2 && $(element).val() == "-0" && (keyCode == 96 || keyCode == 48)) {
        return false;
    }
    if ($(element).val().length == 0 && (keyCode == 189 || keyCode == 109)) {
        return true;
    }
    if ($(element).val().length == 0 && (keyCode == 96 || keyCode == 48)) {
        return true;
    }
    return (keyCode >= 96 && keyCode <= 105 || keyCode == 8 || (keyCode >= 48 && keyCode <= 57));
}

//只能输入正整数
function PositiveInteger(element, keyCode) {
    if (keyCode == 9 || keyCode == 116 || (keyCode >= 35 && keyCode <= 40)) {
        return true;
    }
    if ($(element).val().length == 0 && (keyCode == 96 || keyCode==48))
    {
        return false;
    }
    return (keyCode >= 96 && keyCode <= 105 || keyCode == 8 || (keyCode >= 48 && keyCode <= 57));
}

//只能输入英文+空格
function PositiveEnglish(keyCode)
{
    if (keyCode == 9 || keyCode == 116 || (keyCode >= 35 && keyCode <= 40)) {
        return true;
    }
    return ((keyCode >= 65 && keyCode <= 90) || keyCode == 32 || keyCode==8);
}

//带负号的
整数function PositiveInteger2(element, keyCode) {
    if ($(element).val().length == 1 && $(element).val() != "-" && $(element).val() != "0" && (keyCode == 96 || keyCode == 48)) {
        return true;
    }
    if (keyCode == 9 || keyCode == 116 || (keyCode >= 35 && keyCode <= 40)) {
        return true;
    }
    if ($(element).val().length == 0 && (keyCode == 189 || keyCode == 109)) {
        return true;
    }
    if ($(element).val().length == 0 && (keyCode == 96 || keyCode == 48)) {
        return true;
    }
    if ($(element).val().length == 1 && (keyCode == 96 || keyCode == 48)) {
        return false;
    }
    return (keyCode >= 96 && keyCode <= 105 || keyCode == 8 || (keyCode >= 48 && keyCode <= 57));
}

中文这里 使用 keypup="functionname(this)"

//只能输入中文
function PositiveChina(element) {
    $(element).val($(element).val().replace(/[^\u4e00-\u9fa5]/g, ''));
}