Trim 함수 자바스크립트로 사용하기 입니다.

<script language="javascript">
 
function ltrim(value)
{
  var LeftTrimValue = "";
  var i=0;
 
  if( value == "" )
        return "";
 
  strLen = value.length;
 
  while(i<strLen)
  {
    if(value.charAt(i) != " ") break;
    i++;
  }
 
  for(s=i;s<strLen;s++)
  {
    LeftTrimValue = LeftTrimValue + value.charAt(s);
  }
 
  return LeftTrimValue;
}
 
function rtrim(value)
{
  var RightTrimValue = "";
 
  if( value == "" )
        return "";
 
  strLen = value.length;
 
  --strLen;
 
  while( 0 <= strLen)
  {
    if(value.charAt(strLen) != " ") break;
    --strLen;
  }
 
  for(s=0;s<=strLen;s++)
  {
    RightTrimValue = RightTrimValue + value.charAt(s);
  }
 
  return RightTrimValue;
}
 
function trim(value)
{
  return rtrim(ltrim(value));
}
 
function test()
{
  switch(eval(form.sel.value))
  {
    case 1 :  alert("\"" + trim(form.ok.value)  + "\"" ); break;
    case 2 :  alert("\"" + rtrim(form.ok.value) + "\"" ); break;
    case 3 :  alert("\"" + ltrim(form.ok.value) + "\"" ); break;
  }
}
</script>