what is this doing?

[rich werth]

Hi
Can anyone tell me what this is doing? This is the whole function and does what it is supposed to do.....Check to see if data is missing in form fields but it doesn't check to see if a user enters in just spaces.
function validateMe(theForm)
{
var emptyFields=""
var size = <%=splitSize%>*5;
for (i=0; i <= size; i++)
{

if(theForm.elements[i].value=="")
{
comma=(emptyFields=="")?"":", "
emptyFields=emptyFields+comma+theForm.elements[i].name}}
{
if (emptyFields!="")
{
alert('All Fields must contain data. \n'+'Please return and complete the form.')
return false
}
}
}

[James Swan]

I don't know why JavaScript didn't include trim methods on the String object but all is not lost.
The following code adds that functionality to Strings, just paste it somewhere in your script tag, or have it as an include file.
To use the trim functions do something like:
if (document.myForm.myTextbox.trim() == "") {
alert("text must be entered");
}
Here is the code:

/** StringExtend.js
 *  JavaScript to extend String class
 *  - added trim methods
 *    - uses regular expressions and pattern matching.
 *
 *  eg.
 *    var s1 = new String("   abc   ");
 *    var trimmedS1 = s1.trim();
 *
 *  similary for String.triml() and String.trimr().
 */
/**************************************************************************/
function trim() {
  var s = null;
  // trim white space from the left
  s = this.replace(/^[\s]+/,"");
  // trim white space from the right
  s = s.replace(/[\s]+$/,"");
  return s;
}
/**************************************************************************/
function triml() {
  // trim white space from the left 
  return this.replace(/^[\s]+/,"");
}
/**************************************************************************/
function trimr() {
  // trim white space from the right
  return this.replace(/[\s]+$/,"");
}
/**************************************************************************/
String.prototype.trim = trim;
String.prototype.triml = triml;
String.prototype.trimr = trimr;
/**************************************************************************/

[Anonymous]

Hey, James! That was cool! I didn't know you could extend stuff that way in Javascript. I am so going to be using that.
[ May 02, 2002: Message edited by: Bodie Minster ]