var elements=document.getElementById('tblProdukter').getElementsByTagName('tr'); 
var l=elements.length; 

for (i=0;i<l;i++){
elements[i].onmouseover = function(){this.style.backgroundColor="#d3d3d3"};
elements[i].onmouseout = function(){this.style.backgroundColor=""};
}

var elements2=document.getElementById('tbl2Produkter').getElementsByTagName('tr'); 
var l=elements2.length; 

for (i=0;i<l;i++){
elements2[i].onmouseover = function(){this.style.backgroundColor="#d3d3d3"};
elements2[i].onmouseout = function(){this.style.backgroundColor=""};
}