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

//Checks validity of date fields
function chkDate(tmpStr)
{
	var dt_pat = /^\d{2,2}\/\d{2,2}\/\d{4,4}$/;
	if(!dt_pat.test(tmpStr))
	{
		return false;
	}
	var dtGiven = new Date(tmpStr);
	var arrDt = tmpStr.split("/");
	var dtMon = parseInt(arrDt[0],10);//force decimal or else 08,09 will return 0
	var dtDay = parseInt(arrDt[1],10); //force decimal or else 08,09 will return 0
	var dtYear = parseInt(arrDt[2],10); //force decimal or else 08,09 will return 0
	if((dtGiven.getMonth() != dtMon - 1) || (dtGiven.getDate() != dtDay) || (dtGiven.getFullYear() != dtYear))
	{
		return false;
	}
	return true;
}

//Checks phone number by pattern
function chkPhone(tmpStr)
{
	var ph_pat = /^(\d{3})[-\.](\d{3})[-\.](\d{4})$/;
	return(ph_pat.test(tmpStr));
}

//Checks CC Number by pattern
function chkCCNum(tmpStr)
{
	var cc_pat = /^(\d{14,16})$/
	return(cc_pat.test(tmpStr));
}

//Function to refresh captcha
function refreshCaptcha(imgid)
{
	var img = new Image();
	img.src = 'captcha/show_captcha.php?hash='+parseInt(Math.random() * 10000000000);
	document.getElementById(imgid).src = img.src;
}