function forIe7(){
	document.getElementById('botB1').style.display = "none";
	document.getElementById('botB2').style.display = "none";
	document.getElementById('botB3').style.display = "none";
}

function forIe7Reverse1(){
	document.getElementById('botB1').style.display = "block";
	document.getElementById('botB2').style.display = "none";
	document.getElementById('botB3').style.display = "none";
}

function forIe7Reverse2(){
  	document.getElementById('botB1').style.display = "none";
	document.getElementById('botB2').style.display = "block";
	document.getElementById('botB3').style.display = "none";
}

function forIe7Reverse3(){
  	document.getElementById('botB1').style.display = "none";
  	document.getElementById('botB2').style.display = "none";
	document.getElementById('botB3').style.display = "block";
}