function setH(a,b)
{
obj1=document.getElementById(a);
obj2=document.getElementById(b);
//obj3=document.getElementById('div3');
H=Math.max(obj1.offsetHeight,obj2.offsetHeight);

obj1.style.height=H+'px';
obj2.style.height=H+'px';
//obj3.style.height=H+'px';
}