function GetXmlHttpObject(){
	var xmlHttp=null;
	try{
	  	// Firefox, Opera 8.0+, Safari
	  	xmlHttp=new XMLHttpRequest();
  	}
	catch (e){
	  // Internet Explorer
	  try{
	    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	  }
	  catch (e){
	    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
	  }
	}
	return xmlHttp;
}

function trim(stringToTrim){
	return stringToTrim.replace(/^\s+|\s+$/g,'');
}




function userlogin()
	{

		var pws=document.login.password.value;
		var email2=document.login.email.value;

	     if(trim(document.login.email.value)=='')
	    			{
	    				//alert("Please enter your email id");
	    				document.getElementById("shab2").style.display="block";
	    				document.getElementById("shab3").style.display="none";
	    				document.getElementById("shab4").style.display="none";
	    				document.getElementById("shab").style.display="none";
	    				document.getElementById("shab5").style.display="none";
	    				document.login.email.focus();
	    				return false;
	    			}
    			if(document.login.email.value!="")
					{
			 			str=document.login.email.value;
						var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i ;
						if (!filter.test(str))
						 {

	    				document.getElementById("shab3").style.display="block";
	    				document.getElementById("shab2").style.display="none";
	    				document.getElementById("shab4").style.display="none";
	    				document.getElementById("shab5").style.display="none";
	    				document.getElementById("shab").style.display="none";
			 				document.login.email.focus();
			 				return false;
				         }
			        }
		        if(trim(document.login.password.value)=='')
		        	{
		        		document.getElementById("shab4").style.display="block";
	    				document.getElementById("shab2").style.display="none";
	    				document.getElementById("shab3").style.display="none";
	    				document.getElementById("shab5").style.display="none";
	    				document.getElementById("shab").style.display="none";
		        		document.login.password.focus();
		        		return false;
		        	}
		        	else
		        	{

						document.getElementById("shab4").style.display="none";
	    				document.getElementById("shab2").style.display="none";
	    				document.getElementById("shab3").style.display="none";
	    				document.getElementById("shab5").style.display="none";
	    				document.getElementById("shab").style.display="none";

			var params = "uemail="+email2+"&upass="+pws;

				xmlHttp2=GetXmlHttpObject();
				var url=" login_next.php? ";
				xmlHttp2.open("POST",url,true);
				xmlHttp2.onreadystatechange=stateChanged2;
				xmlHttp2.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				xmlHttp2.setRequestHeader("Content-length", params.length);
				xmlHttp2.setRequestHeader("Connection", "close");
				xmlHttp2.send(params);
				return false;
	}
	}
function stateChanged2()
	{

	    if (xmlHttp2.readyState==4 && xmlHttp2.status == 200)
		 {

				//alert(xmlHttp2.responseText);


				if(xmlHttp2.responseText=='3')
					{
						window.location="home.php";

					}

			    	else if(xmlHttp2.responseText=='2')
			    	{

		 				document.getElementById("shab").style.display="block";
		 				return false;
			    	}
			    	else if(xmlHttp2.responseText=='1')
			    	{

		 				document.getElementById("shab").style.display="block";
		 				return false;
			    	}

			    	else if(xmlHttp2.responseText=='4')
			    	{

		 				document.getElementById("shab5").style.display="block";
		 				return false;
			    	}




		 }
		else
		 {
		 		//document.getElementById("dd").style.display='block';
	    		//document.getElementById("dd").innerHTML='<img src="/education_images/ajax_loader.gif">&nbsp;&nbsp;Processing....'
		 }
	 }