var dge=document.getElementById;


function cl_expand(a){
     if(!dge)return;
     document.getElementById(a).style.display = (document.getElementById(a).style.display=='none')?'block':'none';
	 
	// if(document.getElementById(a).style.display=='block') 
	 //eval('img_'+a+'.src = "less.gif";'); 
	 //else eval('img_'+a+'.src = "more.gif";'); 
   }


function cl_collapseall(){
    if(!dge)return;
    for(i=1;document.getElementById('ex'+i);i++){
       
		document.getElementById('ex'+i).style.display='none';
      //  eval('img_'+('ex'+i)+'.src = "more.gif";');
      }  
    }


function cl_expandall(){
        if(!dge)return;
    for(i=1;document.getElementById('ex'+i);i++){
       
		document.getElementById('ex'+i).style.display='block';
         eval('img_'+('ex'+i)+'.src = "less.gif";');
      }  
}

function expand(a)
{
	cl_collapseall();
	cl_expand(a);
}