function sitemaincenterinfo(id)
{	 
 	document.getElementById("site-main-center-info1").style.display='none'; 
 	document.getElementById("site-main-center-info2").style.display='none'; 
 	document.getElementById("site-main-center-info3").style.display='none'; 
 	document.getElementById("site-main-center-info4").style.display='none'; 
 	document.getElementById("site-main-center-info"+id).style.display='block'; 
}

function sitemaincenterpub(id)
{	 
 	document.getElementById("site-main-center-pub1").style.display='none'; 
 	document.getElementById("site-main-center-pub2").style.display='none'; 
 	document.getElementById("site-main-center-pub3").style.display='none'; 
 	document.getElementById("site-main-center-pub"+id).style.display='block';
}

function newslettervalidation(elementID) 
{ 
    if (document.getElementById(elementID).value.search(/^[_a-z0-9-]+(.[_a-z0-9-]+)*[^._-]@[a-z0-9-]+(.[a-z0-9]{2,4})*$/) == -1)
    { 
        alert ('entrez une adresse Email valide de forme pseudo@domain.com'); 
        document.getElementById(elementID).focus(); 

        return false; 
    } 
    else 
    {
		return true;
	}
}

function textChange(elementID, defaultText)
{
	var element = document.getElementById(elementID);
	
	if(element.value == defaultText)
	{
		element.value = "";
		element.style.color = "#660066";
	}
	else if(element.value == "")
	{
		element.value = defaultText;
		element.style.color = "#660066";
	}
}