var currentshow=1;
var over=1;

function slideMenu(n) {
	if( over && currentshow != n) {
  	over=0;
	  $("#box_content_"+currentshow).slideUp('slow');	
	  $("#box_content_"+n).slideDown('normal',t);	
	  currentshow=n;
	}
}

function t() {
	over=1;
}