function blockview(evt){
		var objectID = (evt.target) ? evt.target.id : ((evt.srcElement) ? evt.srcElement.id : null);
		if(objectID){
		if (document.getElementById(objectID+'text').className  != "Activ"){
				document.getElementById(objectID+'text').className = "Activ";
				document.getElementById(objectID+'line').style.display = "none";
				
				
				document.getElementById(objectID).style.backgroundImage= "url('/rus/education/img/ita/minus.gif')";					
			}
			else{
				document.getElementById(objectID+'text').className = "Passiv";
				document.getElementById(objectID+'line').style.display = "block";
				
				
				document.getElementById(objectID).style.backgroundImage= "url('/rus/education/img/ita/plus.gif')";					
			}
		}
	}