Question

input 输入框只能输入数字和逗号，用正则表达式怎么写

写在onkeyup事件中

Answer 1

<input name="name" type="text" id="name" height="20%"size="44" onkeypress="return IsNum(event)"/>

function IsNum(e) {

var key = window.event ? e.keyCode : e.which;
var keychar = String.fromCharCode(key);

reg = /[^0-,]/g;
var result = reg.test(keychar);
if(result)
{
// el.className = "warn";
return false;
}
else
{
// el.className = "";
return true;
}
}

Answer 2

正则式/^[\d,]+$/

追问

onkeyup='/^[\d,]+$/' 这样貌似不行

Answer 3

直接检查key code在多少到多少之间就是了，用正则慢