function display_block(){
		var argv = display_block.arguments;
		var argc = display_block.arguments.length;
		var obj = document.getElementById( argv[0] );
		var obj2 = document.getElementById( argv[0] + "_zag" );
		var obj3 = document.getElementById( argv[0] + "_zag2" );

		if( obj.style.display == "" ){
			obj.style.display = argv[1] == "1" ? "none" : "block";    
			obj3.style.display = argv[1] == "1" ? "inline" : "none";
		}
		else{
			obj.style.display = obj.style.display != "block" ? "block" : "none";    
			obj3.style.display = obj3.style.display == "none" ? "inline" : "none";    
		}
		obj2.style.textDecoration = obj2.style.textDecoration != "underline" ? "underline" : "none";    
}