//------------------------------------------------------------------------------------
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 to validate email
//-----------------------------------------------------------------------------------
function chkEmail(tmpStr)
{
	var email_pat = /^[a-z0-9][a-z0-9_\.\-']*[a-z0-9]@[a-z0-9]+[a-z0-9\.\-_]*\.[a-z]+$/i;
	return(email_pat.test(tmpStr));
}

//Refreshes captcha image
function refreshCaptcha(imgid)
{
	var newimg = new Image();
	newimg.src = 'includes/captcha/captcha.php?hash='+parseInt(Math.random() * 10000000000);
	newimg.onload = function(){document.getElementById(imgid).src = newimg.src;}
}

function validateWords(fieldMsg, cntlName, maxChar)
{
	var fieldVal = obj.elements[cntlName].value
	var iwhitespace = /^[^A-Za-z0-9]+/gi; // remove initial whitespace
	var leftTrimmedStr = fieldVal.replace(iwhitespace, "");
	var nonAlp = rExp = /[^A-Za-z0-9]+/gi; // non alphanumeric characters
	var cleanedStr = leftTrimmedStr.replace(nonAlp, " ");
	var splitString = cleanedStr.split(" ");
	var wordCount = splitString.length;

	if(wordCount > maxChar) //Checks the number of words is greater than word limit or not.
	{
		alert(fieldMsg+" should be within "+maxChar+" characters.");
		obj.elements[cntlName].focus();
		obj.elements[cntlName].select();
		return false;
	}
	return true;
}