var DivHeight_Contingut = document.getElementById("Continut").offsetHeight;

var DivTop_footer = 0;

//alert("contingut: " + DivHeight_Contingut);
//alert("noticies: " + DivHeight_Noticies);


DivTop_footer = DivHeight_Contingut + 600;

document.getElementById("footer").style.top = DivTop_footer+"px";