function validateNewsLetter()
{
    var name="";
    var email="";
    var captcha="";
    
    name = document.getElementById('txtName').value;
    email = document.getElementById('txtEmail').value;
    captcha=document.getElementById('txtCap').value;     
//    name = document.getElementById('ctl00_ContentPlaceHolder1_txtName').value;
//    email = document.getElementById('ctl00_ContentPlaceHolder1_txtEmail').value;
//    timeOfCall = document.getElementById('ctl00_ContentPlaceHolder1_txtMessage').value;
        
    if(name == "")
    {   
        alert('Please enter Name');
        document.getElementById('txtName').focus();
        return false;
    }       
    else if(email == "")    
    {        
        alert('Please enter Email');
        document.getElementById('txtEmail').focus();
        return false;
    }
    else if(echeck(email) == false)
    {
          alert("Invalid E-mail ID");
          return false;
    }    else  if(captcha == "")
    {   
        alert('Please enter Varification Code');
        document.getElementById('txtCap').focus();
        return false;
    }
    else
    return true;
}
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		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 ValidateForm(){
	var emailID=document.frmSample.txtEmail
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }