求javascript里限制 text 框里的输入

Question

event.keyCode 肯定不行呀　万一他输中文呢？？

Answer 1

<input type="text" size="20" maxlength="20"  name="new_r_name" value="" onkeyup="value=value.replace(/[\x27\x22\x5C\x2F\x3C\x3E\x26\x23\x2D\x25\x3F\x24\x20\x09\u0100-\uFFFF]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\x39\x34\x92\x47\x62\x60\x38\x35\x45\x37\x63\x36\x32\x09\u0100-\uFFFF]/g,''))">

Answer 2

上面的错了,应该是<input type="text" size="20" maxlength="20"  name="new_r_name" value="" onkeyup="value=value.replace(/[\x27\x22\x5C\x2F\x3C\x3E\x26\x23\x2D\x25\x3F\x24\x20\x09\u0100-\uFFFF]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\x27\x22\x5C\x2F\x3C\x3E\x26\x23\x2D\x25\x3F\x24\x20\x09\u0100-\uFFFF]/g,''))">