function maxHeight(param1,param2){
var height1 = parseInt(document.getElementById(param1).offsetHeight);
var height2 =parseInt(document.getElementById(param2).offsetHeight);
var height;
if(height1 > height2){
 height = height1;
}
else{
   height = parseInt(height2);
}
 document.getElementById(param2).style.height = height+"px"
 document.getElementById(param1).style.height = height+"px"
}