function checkov (id,state) {
	var curr = id.src
	curr1 = curr.substr(curr.length-9,5);
	if(curr1!='_over')  var n = curr.substr(0,curr.length-4)+'_over'+curr.substr(curr.length-4)
	else  var n = curr.substr(0,curr.length-9)+''+curr.substr(curr.length-4)
	id.src = n
}