function trim(strText) {
	// this will get rid of leading spaces
	while (strText.substring(0,1) == ' ')
		strText = strText.substring(1, strText.length);

	// this will get rid of trailing spaces
	while (strText.substring(strText.length-1,strText.length) == ' ')
		strText = strText.substring(0, strText.length-1);

	return strText;
}


function ValidateNumber(textbox){
	if(textbox.value != ""){
		if(isNaN(textbox.value)){
			alert("Please enter a number.");
			textbox.focus();
		}
	}
}


function ConfirmDelete(sName, sAdditionalText){
	var strConfirm = "Are you sure you want to delete '" + sName + "'?";
	if(sAdditionalText != ""){
		strConfirm += "\n" + sAdditionalText;
	}
	return confirm(strConfirm);
}


function IsValidEmail(str) {
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if(str.indexOf(at)==-1){ return false; }
	if(str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){ return false; }
	if(str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){ return false; }
	if(str.indexOf(at,(lat+1))!=-1){ return false; }
	if(str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){ return false; }
	if(str.indexOf(dot,(lat+2))==-1){ return false; }
	if(str.indexOf(" ")!=-1){ return false; }
	return true;
}

	function createCookie(name,value,days) {
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}

	function readCookie(name) {
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}

	function eraseCookie(name) {
		createCookie(name,"",-1);
	}