// <a href="javascript:ts('body',1)">+ Larger Font</a>
            // | <a href="javascript:ts('body',-1)">+ Smaller Font</a>
            
            var tgs = new Array( 'div','td','tr');
            
            //Specify spectrum of different font sizes:
            var szs = new Array( 'x-small','small','medium','large' );
            var startSz = 1;
            
            function ts( trgt,inc ) {
             if (!document.getElementById) return
             var d = document,cEl = null,sz = startSz,i,j,cTags;
            
             sz += inc;
             if ( sz < 0 ) sz = 0;
             if ( sz > 3 ) sz = 3;
             startSz = sz;
            
             if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];
            
             cEl.style.fontSize = szs[ sz ];
            
             for ( i = 0 ; i < tgs.length ; i++ ) {
             cTags = cEl.getElementsByTagName( tgs[ i ] );
             for ( j = 0 ; j < cTags.length ; j++ ) cTags[ j ].style.fontSize = szs[ sz ];
             }
            }


function initMenu() {
	if (document.all&&document.getElementById) {
		var navRoot=document.getElementById('navigation');	
		var nodes=navRoot.getElementsByTagName('li');
		for (i=0;i<nodes.length;i++) {
			var node=nodes[i];				
			node.onmouseover=function() {
				this.className+=(this.className!="")?' over':'over';
			}				
			node.onmouseout=function() {
				this.className=(this.className=="over")?'':this.className.replace(' over', ''); 
			}
		}
	}
}

function showAnswer(answerNumber){
   for (var i = 1; i < 20; ++i){
      var currentAsset = 'answer_' + i;
      if(currentAsset != answerNumber){
         document.getElementById(currentAsset).style.display = 'none';
      }else{
         if(document.getElementById(currentAsset).style.display == 'inline'){
            document.getElementById(currentAsset).style.display = 'none';
         }else{
            document.getElementById(currentAsset).style.display = 'inline';
         }        
      }
   }
}


window.onload=initMenu;