function txtemailclick()
{
	document.getElementById("txtemail").value="";
}

function insertemail()
{
	if(document.getElementById("txtemail").value.length<3)
	{
		alert("3 characters at least");
		return;
	}
	if(checkMail(document.getElementById("txtemail").value)==false)
	{
		alert("Enter your E-mail address");
		return;
	}	
	var result=Shop.SaleWeb.SiteWeb.UserControls.PageLeftNewsletter.InsertEmail(document.getElementById("txtemail").value).value;
	if(result>0)
	{
		alert("success!please check your mail to confirm your subscription!");
	}
	else
	{
		alert("false!You need to have registered membership before newsletter subscription!");
	}
}

function checkMail(str){
    
    var mailArray;   
    var patterns = /^[a-zA-Z0-9_-]+.+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/; 
    mailArray=str.split(",");
    for(i=0;i<mailArray.length;i++)
    { 
        if(patterns.test(mailArray[i]))
        {
            return true;
        }
        else
        {    
            return false;
        }
    }
}