var xmlhttp;
function CheckEmail(str,element_id)
{ 
	
   xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
	  alert("Browser does not support HTTP Request");
	  return;
	}
	  
    var url;

    url="check_availability.php";
	url=url+"?emailid="+str;
	url=url+"&sid="+Math.random();
	//alert(url);
	xmlhttp.onreadystatechange=function checkEmailId()
	{ 
	 if(xmlhttp.readyState==4)
	   {
		 if(xmlhttp.responseText!="")
		 {
		 inlineMsg(element_id,xmlhttp.responseText,2); 
		 document.getElementById(element_id).value="";
		 return false;
		 }
		}
    }
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

function GetBmi()
{

	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
	  alert("Browser does not support HTTP Request");
	  return;
	}

    var weight=document.getElementById("bmi_weight").value;
    var height=document.getElementById("bmi_height").value;
    var str=weight+','+height;
	//alert(str);
    var url;
    url="check_availability.php";
	url=url+"?param="+str;
	url=url+"&sid="+Math.random();
	//alert(url);
	xmlhttp.onreadystatechange=function checkEmailId()
	{ 
	 if(xmlhttp.readyState==4)
	   {
		 if(xmlhttp.responseText!="")
		 {
		  document.getElementById("bmi_id").innerHTML=xmlhttp.responseText;
		 }
	   }
    }
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}




function User_ShippingAddress(str,element_id)
{
   xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
	  alert("Browser does not support HTTP Request");
	  return;
	}
	  
    var url;

    url="check_availability.php";
	url=url+"?shipping_user="+str;
	url=url+"&sid="+Math.random();
	//alert(url);
	xmlhttp.onreadystatechange=function checkshipping()
	{ 
	 if(xmlhttp.readyState==4)
	   {
		 if(xmlhttp.responseText!="")
		 { 
		   //alert(xmlhttp.responseText);
		  document.getElementById(element_id).innerHTML=xmlhttp.responseText;
		 }
	  }
    }
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);

	
}



function CheckEmailExist(str,element_id)
{
  if(str.indexOf("@")!=-1 && str.indexOf(".")!=-1)
  {
     xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
	  alert("Browser does not support HTTP Request");
	  return;
	}
	  
    var url;
    url="check_availability.php";
	url=url+"?check_emailid="+str;
	url=url+"&sid="+Math.random();
	//alert(url);
	xmlhttp.onreadystatechange=function checkEmailId()
	{ 
	 if(xmlhttp.readyState==4)
	   {
		 if(xmlhttp.responseText!="")
		 {
		 inlineMsg(element_id,xmlhttp.responseText,2); 
		 document.getElementById(element_id).value="";
		 return false;
		 }
		}
    }
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
  }
}



function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "images/msg_arrow.gif"; 
}