/**************************************************************
 LTrim: Returns a String containing a copy of a specified 
        string without leading spaces 

 Parameters:
      String = The required string argument is any valid 
               string expression. If string contains null, 
               false is returned

 Returns: String
***************************************************************/
function LTrim(String)
{
	var i = 0;
	var j = String.length - 1;

	if (String == null)
		return (false);

	for (i = 0; i < String.length; i++)
	{
		if (String.substr(i, 1) != ' ' &&
		    String.substr(i, 1) != '\t')
			break;
	}

	if (i <= j)
		return (String.substr(i, (j+1)-i));
	else
		return ('');
}

/**************************************************************
 RTrim: Returns a String containing a copy of a specified 
        string without trailing spaces 

 Parameters:
      String = The required string argument is any valid 
               string expression. If string contains null, 
               false is returned

 Returns: String
***************************************************************/
function RTrim(String)
{
	var i = 0;
	var j = String.length - 1;

	if (String == null)
		return (false);

	for(j = String.length - 1; j >= 0; j--)
	{
		if (String.substr(j, 1) != ' ' &&
			String.substr(j, 1) != '\t')
		break;
	}

	if (i <= j)
		return (String.substr(i, (j+1)-i));
	else
		return ('');
}

/**************************************************************
 Trim: Returns a String containing a copy of a specified 
        string without both leading and trailing spaces 

 Parameters:
      String = The required string argument is any valid 
               string expression. If string contains null, 
               false is returned

 Returns: String
***************************************************************/
function Trim(String)
{
	if (String == null)
		return (false);

	return RTrim(LTrim(String));
}

/**************************************************************
 Len: Returns a Long containing the number of characters in a 
      string or the number of bytes required to store a 
      variable.

 Parameters:
      string = Any valid string expression. If string contains 
               null, false is returned.

 Returns: Long
***************************************************************/
function Len(string)
{
	if (string == null)
		return (false);

	return String(string).length;
}

/**************************************************************
 Replace: Returns a string in which a specified substring has 
          been replaced with another substring a specified 
          number of times.

 Parameters:
      Expression = String expression containing substring to 
                   replace
      Find       = Substring being searched for.
      Replace    = Replacement substring.

 Returns: String
***************************************************************/
function Replace(Expression, Find, Replace)
{
	var temp = Expression;
	var a = 0;

	for (var i = 0; i < Expression.length; i++) 
	{
		a = temp.indexOf(Find);
		if (a == -1)
			break
		else
			temp = temp.substring(0, a) + Replace + temp.substring((a + Find.length));
	}

	return temp;
}

function Validar_Http(inputField){
     if (inputField.value.indexOf("http://")==0) {
          return inputField.value;
     } 
     else {
     	return "http://" + inputField.value;
     }
}

function Popup(url,name,width,height,resize,scroll) {
	var dialogWin = new Object();
	dialogWin.width = width;
	dialogWin.height = height;
	now = new Date();
	var millis=now.getTime();
	var mstr=""+millis;
	if (navigator.appName == "Netscape") {
		dialogWin.left = window.screenX + ((window.outerWidth - dialogWin.width) / 2);
		dialogWin.top = window.screenY + ((window.outerHeight - dialogWin.height) / 2);
		var attr = 'screenX=' + dialogWin.left + ',screenY=' + dialogWin.top + ',resizable=' + resize + ',width=' + dialogWin.width + ',height=' + dialogWin.height + ',scrollbars=' + scroll + ',menubar=no,location=no,toolbar=no,status=no,directories=no';
	} else if (document.all) {
		dialogWin.left = (screen.width - dialogWin.width) / 2;
		dialogWin.top = (screen.height - dialogWin.height) / 2;
		var attr = 'left=' + dialogWin.left + ',top=' + dialogWin.top + ',resizable=' + resize + ',width=' + dialogWin.width + ',height=' + dialogWin.height + ',scrollbars=' + scroll + ',menubar=no,location=no,toolbar=no,status=no,directories=no';
	}
window.open(url,name,attr);
}

function EW_extValue(object_value, extArray) { 
var allowSubmit = false; 

if (object_value.length == 0) 
return true; 

while (object_value.indexOf("\\") != -1) 
object_value = object_value.slice(object_value.indexOf("\\") + 1); 
ext = object_value.slice(object_value.indexOf(".")).toLowerCase(); 
for (var i = 0; i < extArray.length; i++) { 
if (extArray[i] == ext) { allowSubmit = true; break; } 

} 
if (allowSubmit) 
return true; 
else 
return false; 
}