function strTrim(tmpStr)
{
	tmpStr = tmpStr.replace(/^\s+/,"");//remove leading
	tmpStr = tmpStr.replace(/\s+$/,"");//remove trailing
	return tmpStr;
}
//------------------------------------------------------------------------------------
function trimFields()
{
	for(var i=0; i < obj.elements.length; i++)
	{
		if(obj.elements[i].type == "text" || obj.elements[i].type == "textarea" || obj.elements[i].type == "password")
		{
			obj.elements[i].value = strTrim(obj.elements[i].value);
		}
	}
}
//------------------------------------------------------------------------------------
function chkEmail(tmpStr)
{
	var email_pat = /^[a-z][a-z0-9_\.\-]*[a-z0-9]@[a-z0-9]+[a-z0-9\.\-_]*\.[a-z]+$/i;
	return(email_pat.test(tmpStr));
}

//============================================
//============ Checks URL against link =======
//============================================
function chkURL(tmpStr)
{
	var url_pat = /^(http|https|ftp):\/\/([\w-]+\.)+[\w-]+(\/[\w-\.\/?%&amp;,=#@\/:]*)?/;
	return(url_pat.test(tmpStr));
}

//==========================================
//=========Fade in and Fade out effects=====
//==========================================
var op = 0;
var delay = 5;

function fadeIn()
{
	if(op == 0) ad.style.visibility = 'visible';
	op += 2;
	ad.style.filter = 'alpha(opacity=' + op + ')';
	ad.style.opacity = op / 100;
	if(op < 100)
		setTimeout('fadeIn()', delay);
}

function fadeOut()
{
	op -= 2;
	ad.style.filter = 'alpha(opacity=' + op + ')';
	ad.style.opacity = op / 100;
	if(op > 0)
		setTimeout('fadeOut()', delay);
	else
		ad.style.visibility = 'hidden';
}