📄 zipcode.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<script language="javaScript">
function validZip(theField)
{
var theInput=theField.value;//获取文本内的内容
var theLength=theInput.length; //获取文本的长度
var goodZip=true;//标志
if(theLength!=6)
{
goodZip=false;
}
if(theLength==6)
{
for(var i=0;i<5;i++)
{
var theChar=theInput.substring(i,i+1);
if(theChar<"0"||theChar>"9")
{
goodZip=false
}
}
}
if(goodZip==false)
alert("this dose not appear to be a valid zip code!");
if(goodZip==true)
alert("that's right")
}
</script>
</HEAD>
<BODY>
<form name=thisForm>
Zip Code:
<input type="text" name="Zip" size=6 onBlur="validZip(this.form.Zip)">
</form>
</BODY>
</HTML>
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