function getXMLHTTPinstance() {
	var xmlhttp = false;
	var userAgent = navigator.userAgent.toLowerCase() ;

	// IE Check supports ActiveX controls
	if (userAgent.indexOf("msie") != -1 && userAgent.indexOf("mac") == -1 && userAgent.indexOf("opera") == -1) {
		var version = navigator.appVersion.match(/MSIE (.\..)/)[1] ;
		if(version >= 5.5 ) {
			try {
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch (e) {
				try {
					xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch (E) {
					xmlhttp = false;
				}
			}
		}
	}
	
	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

// NOW LOAD THE OBJECT..
var global_xmlhttp = getXMLHTTPinstance();

function http_fetch_sync(url,post_data) {
	global_xmlhttp = getXMLHTTPinstance();
	var method = 'GET';

	if(typeof(post_data) != 'undefined') method = 'POST';
	try {
		global_xmlhttp.open(method, url,false);
	}
	catch(e) {
		alert('message:'+e.message+":url:"+url);
	}
	if(method == 'POST') {
		global_xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	}
	var request_id = "crmone";

	global_xmlhttp.send(post_data);
	
	var args = {"responseText" : global_xmlhttp.responseText,
				"responseXML" : global_xmlhttp.responseXML,
				"request_id" : request_id};
	return args;

}
// this is a GET unless post_data is defined

function http_fetch_async(url,callback,request_id,post_data) {
	var method = 'GET';
	if(typeof(post_data) != 'undefined') {
		method = 'POST';
	}
	
	try {
		global_xmlhttp.open(method, url,true);
	}
	catch(e) {
		alert('message:'+e.message+":url:"+url);
	}
	if(method == 'POST') {
		global_xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	}
	global_xmlhttp.onreadystatechange = function() {                                                
		if(global_xmlhttp.readyState==4) {
			if(global_xmlhttp.status == 200) {
				var args = {"responseText" : global_xmlhttp.responseText,
							"responseXML" : global_xmlhttp.responseXML,
							"request_id" : request_id };
				callback.call(document,args);
			}
			else {
				alert("There was a problem retrieving the XML data:\n" + global_xmlhttp.statusText);
			}
		}
	}
	global_xmlhttp.send(post_data);
}

function isValidEmail(emailStr) {
	if(emailStr.length== 0) {
		return true;
	}
	if(!/^\w+(['\.\-\+]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(emailStr))
		return false
	return true	
}


function isChar(str) {
	var re1=/^[a-z\d\_ ]+$/i;
	if (!re1.test(str))
	{
		return false;
	} else {
		return true;
	}	
}