function onlyNum(evt)
{
if(evt==null){evt=window.event;}
var keycode = evt.keyCode; //取得键盘码
var realkey = String.fromCharCode(keycode); //以键盘码转成键盘符号
if(keycode==8 ||keycode==9 || keycode==46|| (keycode>=35 && keycode<=40)||(keycode>=96 && keycode<=105))
return;
else if(!/\d/.test(realkey))
{
if(navigator.appName=="Netscape")
{
//区分浏览器种类
evt.preventDefault();
return false;
}
else
{
window.event.returnValue = false;
}
}
}
{
if(evt==null){evt=window.event;}
var keycode = evt.keyCode; //取得键盘码
var realkey = String.fromCharCode(keycode); //以键盘码转成键盘符号
if(keycode==8 ||keycode==9 || keycode==46|| (keycode>=35 && keycode<=40)||(keycode>=96 && keycode<=105))
return;
else if(!/\d/.test(realkey))
{
if(navigator.appName=="Netscape")
{
//区分浏览器种类
evt.preventDefault();
return false;
}
else
{
window.event.returnValue = false;
}
}
}