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 setPaymentInfo(isChecked)
{
	with (window.document.frmCheckout) {
		if (isChecked) {
			txtPaymentFirstName.value  = txtShippingFirstName.value;
			txtPaymentLastName.value   = txtShippingLastName.value;
			txtPaymentAddress1.value   = txtShippingAddress1.value;
			txtPaymentAddress2.value   = txtShippingAddress2.value;
			txtPaymentPhone.value      = txtShippingPhone.value;
			txtPaymentState.value      = txtShippingState.value;			
			txtPaymentCity.value       = txtShippingCity.value;
			txtPaymentPostalCode.value = txtShippingPostalCode.value;
			
			txtPaymentFirstName.readOnly  = true;
			txtPaymentLastName.readOnly   = true;
			txtPaymentAddress1.readOnly   = true;
			txtPaymentAddress2.readOnly   = true;
			txtPaymentPhone.readOnly      = true;
			txtPaymentState.readOnly      = true;			
			txtPaymentCity.readOnly       = true;
			txtPaymentPostalCode.readOnly = true;			
		} else {
			txtPaymentFirstName.readOnly  = false;
			txtPaymentLastName.readOnly   = false;
			txtPaymentAddress1.readOnly   = false;
			txtPaymentAddress2.readOnly   = false;
			txtPaymentPhone.readOnly      = false;
			txtPaymentState.readOnly      = false;			
			txtPaymentCity.readOnly       = false;
			txtPaymentPostalCode.readOnly = false;			
		}
	}
}

function validate_form ( )
{
    valid = true;

    if ( document.frmCheckout.txtShippingFirstName.value == "" )
    {
        alert ( "Please fill in the your First Name" );
        return false;
    }
	if ( document.frmCheckout.txtShippingLastName.value == "" )
    {
        alert ( "Please fill in the your Last Name" );
        return false;
    }
	if ( document.frmCheckout.txtShippingAddress1.value == "" )
    {
        alert ( "Please fill in the your Address" );
        return false;
    }
	if ( document.frmCheckout.txtShippingPhone.value == "" )
    {
        alert ( "Please fill in the your Phone Number" );
        return false;
    }
	if ( document.frmCheckout.txtShippingState.value == "" )
    {
        alert ( "Please fill in the your State" );
        return false;
    }
	if ( document.frmCheckout.txtShippingCity.value == "" )
    {
        alert ( "Please fill in the your City" );
        return false;
    }
	if ( document.frmCheckout.txtShippingPostalCode.value == "" )
    {
        alert ( "Please fill in the your Postal Code" );
        return false;
    }

	if ( document.frmCheckout.txtPaymentFirstName.value == "" )
    {
        alert ( "Please fill in the your Payment - First Name" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentLastName.value == "" )
    {
        alert ( "Please fill in the your Payment - Last Name" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentAddress1.value == "" )
    {
        alert ( "Please fill in the your Payment - Address" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentPhone.value == "" )
    {
        alert ( "Please fill in the your Payment - Phone Number" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentState.value == "" )
    {
        alert ( "Please fill in the your Payment - State" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentCity.value == "" )
    {
        alert ( "Please fill in the your Payment - City" );
        return false;
    }
	if ( document.frmCheckout.txtPaymentPostalCode.value == "" )
    {
        alert ( "Please fill in the your Payment - Postal Code" );
        return false;
    }
	if ( document.frmCheckout.txtEmail.value == "" )
    {
        alert ( "Please fill in the your Email address" );
        return false;
    }
	
	if ( document.frmCheckout.txtCompany.value == "" )
    {
        alert ( "Please fill in the your Company Name" );
        return false;
    }
	
    return valid;
}


function validate_email ( )
{ 
	valid = true;

    if ( document.frmCheckout.txtEmail.value == "" )
    {
        alert ( "Please fill in the your Email address" );
        return false;
    }
	
	return valid;
}


function validate_details ( )
{ 
	valid = true;

    if ( document.frmDetails.txtEmail.value == "" )
    {
        alert ( "Please fill in the your Email address" );
        return false;
    }
	
	if ( document.frmDetails.txtCompany.value == "" )
    {
        alert ( "Please fill in the your Company Name" );
        return false;
    }
	
	return valid;
}


function ValidateForm4 ( ) 
{
	var emailID=document.frmCheckout.txtEmail;
	var companyID=document.frmCheckout.txtCompany;
	
	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;
	}
	if ((companyID.value==null)||(companyID.value=="")){
		alert("Please Enter your Company Name");
		companyID.focus();
		return false;
	}
	
	return true;
 }