checked=false;

function CheckedAll(Form1) 
{
	var aa= document.getElementById('Form1');
	 if (checked == false)
          {
           checked = true
          }
        else
          {
          checked = false
          }
	for (var i =0; i < aa.elements.length; i++) 
	{
	 aa.elements[i].checked = checked;
	}
}


function CheckSelected()
{
	var Counter=0;
	
	var F= document.getElementById('Form1'); 
	for (var i =0; i < F.elements.length; i++) 
	{
	 if(F.elements[i].checked==true)
	 {
	 Counter++;
	 }
	}

	if(Counter==0)
	{
	 alert("No Product is selected.");	
	 return false;
	}
}



function SubmitForm()
{
  document.Form1.submit();
}


function CheckForm(Form)
{
	if(Check(Form.Email.value)==false)
	{
	Form.Email.value="";
	Form.Email.focus();
	return false;
	}
		else
			return true;
}


function Check(str) 
{
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		
		if(Trim(str)=="")
		{
		 alert("Please enter your email address. It is required.")
		 return false	
		}
		
		if (str.indexOf(at)==-1){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}
	

function Trim(str)
{
	if(str=="")
	str=" ";
	
    if(!str || typeof str != 'string')
        return null;

    return str.replace(/^[\s]+/,'').replace(/[\s]+$/,'').replace(/[\s]{2,}/,' ');
}

function isNumberKey(evt)
{
   var charCode = (evt.which) ? evt.which : event.keyCode
   	if (charCode > 31 && (charCode < 48 || charCode > 57))
   	return false;
		else
        return true;
}



function ajaxFunction()
{
	var xmlhttp;
	var URL="page.php";

	if (window.XMLHttpRequest)
  	xmlhttp=new XMLHttpRequest();
		else if (window.ActiveXObject)
  		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
			else
  			alert("Your browser does not support XMLHTTP!");

  
	xmlhttp.onreadystatechange=function()
	{
		if(xmlhttp.readyState==4)
  		document.getElementById("block1").innerHTML=xmlhttp.responseText;
 			else
	 		document.getElementById("block1").innerHTML="<img src='images/Load.gif'>";
	}


xmlhttp.open("GET",URL,true);
xmlhttp.send(null);
}