// detection du navigateur
try{
	var ns4=document.layers;
}
catch(error){}
try{
var ie4=document.all;
}
catch(error){}
var ns6=document.getElementById&&!document.all;

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function RollOver(img,lien){
document.images[img].src=lien;
}


<a href="#" onClick="MM_openBrWindow('../images/nos_maisons/photo12.jpg','','scrollbars=yes,width=530,height=400')"><img src="../images/nos_maisons/illu-nos-architectures12.jpg" alt="Visuel Maison rouquie" width="175" height="126" border="0"  class="imgLeft2"/></a>