随手笔记 - input标签 只能输入整数

<input type="text" id="inputText_' + p_cid + '_2" maxlength="3" value="50" style="width:30px;" oninput="onBlur_number_setVale(this)" />

function onBlur_number_setVale(p_obj) {
    var val = 0;
    if (p_obj.value == "") {
        val = 0;
    } else {
        if (parseInt(p_obj.value) >= 0) {
            val = parseInt(p_obj.value);
        } else {
            var value = p_obj.value;
            var valueLength = value.length;
            for (var i = 0; i < valueLength; i++) {
                var v = value.substr(0, valueLength - 1 - i);
                if (parseInt(v) >= 0) {
                    val = v;
                    break;
                }

                if (i == valueLength - 1) {
                    val = 0;
                }
            }
        }
    }
    p_obj.value = val;
}