/**
 * mark one element in the similarity matrix
 */
function mark(from, to) {
   if(from == to){
      return;
   }
   m = getElement("id","m"+from+"_"+to )
   f = getElement("name","c"+from+"_"+to , 0)

   if( m.style.fontWeight != "bold" ){
      m.style.fontWeight = "bold";
      f.value = "1";
   }else{
      m.style.fontWeight = "normal";
      f.value = "0";
   }
}

/**
 * mark one row in the similarity matrix
 */
function mark_row(from){
	for(i=0; i< 10; i++){
            mark(from, i);
        }
}

/**
 * mark one column in the similarity matrix
 */
function mark_col(to){
	for(i=0; i<10; i++){
            mark(i, to);
        }
}

/**
 * mark the complete similarity matrix
 */
function mark_everything(){
	for(j=0; j<10; j++){
		mark_row(j);
	}
}




/**
 * highlight an interval in the boxed pq-tree representation
 */
function highlight_interval( prefix, start, end, color ){

	t = document.getElementById(prefix+"_"+start+"_"+end)
   
	if(t.style.backgroundColor == "transparent" ||t.style.backgroundColor == "" ){
		t.style.backgroundColor = color;
	}else{
		t.style.backgroundColor = "transparent";
	}
}