<script language="javascript">
function a(val){
var re =/\d{1,}-\d{1,}/;
if(!re.test(val))
alert("nono");
}
</script><input type=text name="aaa" onblur="a(this.value)">
function a(val){
var re =/\d{1,}-\d{1,}/;
if(!re.test(val))
alert("nono");
}
</script><input type=text name="aaa" onblur="a(this.value)">
function onlyNum()
{
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)))
event.returnValue=false;
}
</script><input onkeydown="onlyNum();">