function OutGif(imgSrc) {
document.images[imgSrc].src = "images/"+ imgSrc + ".gif";
}

function OverGif(imgSrc) {
document.images[imgSrc].src = "images/"+ imgSrc + "_ov.gif";
}

function OutJpg(imgSrc) {
document.images[imgSrc].src = "images/"+ imgSrc + ".jpg";
}

function OverJpg(imgSrc) {
document.images[imgSrc].src = "images/"+ imgSrc + "_ov.jpg";
}

function validate_email(field,alerttxt)
{
with (field)
{
//apos=value.indexOf("@")
//dotpos=value.lastIndexOf(".")
var email=document.forms['theform'].elements['email'].value
if ((email.length<6) || (email.indexOf(",")>=0) || (email.indexOf(";")>=0) || (email.indexOf(":")>=0) || (email.indexOf("/")>=0) || (email.indexOf(" ")>=0) || (email.indexOf("@")<=0) || (email.indexOf("@") != email.lastIndexOf("@")) || (email.lastIndexOf(".")<email.indexOf("@")) || ((email.lastIndexOf(".")+3)>email.length))
//if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_form(thisform)
{
with (thisform)
{
if (validate_email(email,"Votre e-mail est invalide!")==false)
  {email.focus();return false}
}
}