for( var i=0;i<document.stationform.stationno.value.length;i++ ){ var ch = document.stationform.stationno.value.charAt(i); if(!(ch>='0'&&ch<='9')){ alert("车站编号必须为数字!"); document.stationform.stationno.focus(); return false; } }
function checknum(m) { var flag = 0 ; var n; n = newform.fkm14.value; if (isNaN(n)==true) { flag = flag + 1; } if (flag>0) { alert("必须是数字!"); m.select(); } }
<!--
function Check() {
var Temp=Num.value.substring(0,Num.value.length-1);
if(event.keyCode<48 || event.keyCode>57)
Num.value=Temp;
}
-->
</Script>
<Input Type=Text OnKeyUp="Check()" Name="Num" onpaste="return false;">
var ch = document.stationform.stationno.value.charAt(i);
if(!(ch>='0'&&ch<='9')){
alert("车站编号必须为数字!");
document.stationform.stationno.focus();
return false; }
}
{
var flag = 0 ;
var n;
n = newform.fkm14.value;
if (isNaN(n)==true)
{
flag = flag + 1;
}
if (flag>0)
{
alert("必须是数字!");
m.select();
}
}