// JavaScript Document
function getElementsByClass(node,searchClass,tag) {   
    var classElements = new Array();   
        if ( node == null )   
            node = document;   
        if ( tag == null )   
            tag = '*';   
    var els = node.getElementsByTagName(tag); // use "*" for all elements   
    var elsLen = els.length;   
    var pattern = new RegExp("\\b"+searchClass+"\\b");   
    for (i = 0, j = 0; i < elsLen; i++) {   
         if ( pattern.test(els[i].className) ) {   
         classElements[j] = els[i];   
         j++;   
         }   
    }   
    return classElements;   
  }   
  
   function checkbyclass(theClass,id) {   
   
    var el = getElementsByClass(document,theClass);   
    var elLength = el.length;
	   
    for (i = 0; i < elLength; i++ ){   
		
		if(el[i].id != id){			
        	el[i].style.display = 'none';   			
		}else{
			 if(document.getElementById(id).style.display == 'none'){
				document.getElementById(id).style.display = 'block';
			}else{
				document.getElementById(id).style.display = 'none';
			}			
		}
		
		
		
    };   
  }   

   function checkbyclass_none(theClass) {   
   
    var el = getElementsByClass(document,theClass);   
    var elLength = el.length;
	   
    for (i = 0; i < elLength; i++ ){   
		
		el[i].style.display = 'none';
						
	}
		

  }