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<HTML>
<HEAD>
<SCRIPT language="JavaScript">
function check_it()
{
var thetext=document.myForm.the_time.value;
if (thetext.indexOf(":") == -1)
{
window.alert("No colon(:)");
return false;
}
else
{
return true;
}
}
</SCRIPT>
</HEAD>
<BODY>
<FORM name="myForm" action="#" onSubmit="return check_it();">
Time:<INPUT type="text" name="the_time">
<INPUT type="submit" value="Submit">
</BODY>
</HTML>
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