Javascript form validation

try this

function validate(field) {
var valid = "0123456789"
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Invalid entry!  Only numbers are accepted!");
field.focus();
field.select();
   }
}

and use the below to use the above

<input type=text name="entry" onBlur="validate(this)">


Edited by dj air - 09 May 2005 at 7:02am