window.onload = show;

function show(){
	
	if ( !document.getElementById){
		return;
	}
	var tab = document.getElementById("ic");
	var	ind = document.getElementById("ic_ind");
	tab.onmouseover = function () {
		if(ind.style.display == "block"){
			ind.style.display = "none"
		} else {
			ind.style.display = "block";
		}
	}
}