function workforchange(changer){

			  var stringArray = changer.split("_");

				var stripNum = stringArray[1];



				var toggle = document.getElementById('toggle_'+stripNum);

				var content = document.getElementById('content_'+stripNum);

				

				if(content.style.display=='none' || content.style.display==''){

				  content.style.display = 'block';

				  toggle.src = 'referencement-images/moins.gif';

					}

				else{

				  content.style.display = 'none';

				  toggle.src = 'referencement-images/plus.gif';

					}

			  }