function testmail(mail){
var regexpmail = new RegExp("[a-z]+[0-9]*@[a-z]+[0-9]*.[a-z]+[0-9]*");
if(mail.match(regexpmail))
	{
		return true;
	}else{
		return false;
	}
}

function testnum(num){
var regexpmail = new RegExp("^[0-9]*$");
if(num.match(regexpmail))
	{
		return true;
	}else{
		return false;
	}
}

function ChangeClassNameStyle(clsName)

{

var elems = document.getElementsByTagName("*");

	for ( var i = 0; ( elem = elems[i] ); i++ )

	{

		if ( elem.className == clsName )

		{

			elem.style.display='';

		}
	}
}

function cache(clsName)

{

var elems = document.getElementsByTagName("*");

	for ( var i = 0; ( elem = elems[i] ); i++ )

	{

		if ( elem.className == clsName )

		{

			elem.style.display='none';

		}
	}
}



function validform()
{
if(document.abonewlet.email.value == ""){
	ChangeClassNameStyle('erreurmail');
}
else{
	if(testmail(document.abonewlet.email.value) == true){
		validation++;
		cache('erreurmail');
		cache('erreurmailfo');
	}
	else{
		ChangeClassNameStyle('erreurmailfo');
	}
	cache('erreurmail');
	
}
return false;
}