function GetXmlHttpObject(){ 
	var objXMLHttp=null
	
 if(window.XMLHttpRequest){

        objXMLHttp=new XMLHttpRequest()
		
	}else if(window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}
function checkStrength()
{
	var password		=	document.getElementById('password').value;
	for (i=0;i<=password.length-1;i++)
	{
		var password_first	=	password.charAt(i);
		if(password_first == ' ')
		{
			alert("Please Enter password");
			document.getElementById("password").value = '';
			document.getElementById("password").focus();
			document.getElementById("show_page").innerHTML ='';
			return false;		
		}
	}
	var password1		=	isNaN(password);
	if(password1 == false)
	{
		alert("Please Enter Password");
		document.getElementById("password").value = '';
		document.getElementById("password").focus();
		document.getElementById("show_page").innerHTML ='';
		return false;		
	}
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
	alert ("Your browser does not support HTTP Request")
	return
} 
var url = 'password_strength.php?password=' + escape(password);
xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = updateProject;
xmlHttp.send(null);
}

function updateProject() {
  if (xmlHttp.readyState == 4 || xmlHttp.readyState=="complete") {
  	document.getElementById("show_page").innerHTML =xmlHttp.responseText;
  }
}



function changeField()
{
	if(document.getElementById('city').value!='')
	{	
		document.getElementById('zip').disabled=true;
	}
	else
	{
		document.getElementById('zip').disabled=false;
	}
	if(document.getElementById('zip').value!='')
	{	
		document.getElementById('city').disabled=true;
	}
	else
	{
		document.getElementById('city').disabled=false;
	}
}