function checktitle(id)
{
	var e = document.getElementById(id);
	e.value = trim(e.value);
	if(e.value.length==0)
	{
		e.focus();
		alert('this field can not be empty');
		return false;
	}
	return true;
}



function ltrim(str)
{
	str1 = str;
	var length = str1.length;
	while(str1.indexOf(" ")==0)
	{
		length = length - 1;
		str1 = str1.substr(1, length);
	}
	return str1;
}
function rtrim(str)
{
	str1 = str;
	var length = str1.length - 1;
	while(str1.lastIndexOf(" ")==length)
	{
		str1 = str1.substr(0, length);
		length = length - 1;
	}
	return str1;	
}
function trim(str)
{
	return rtrim(ltrim(str));
}
function messageWindow(url)
{
	var width="" + screen.width - 50 + "";
	var height="" + screen.height/2 + "" ;
	var left = (screen.width/2) - width/2;
	var top = (screen.height/2) - height/2;
	var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
	var msgWindow = window.open(url,"msgWindow", styleStr);
}
function popupsendthispage(url)
{
	var width="370";
	var height="" + screen.height/10 + "" ;
	var left = (screen.width/2) - width/2;
	var top = (screen.height/2) - height/2;
	var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
	var msgWindow = window.open(url,"msgWindow", styleStr);
}