var el;
	window.onload=function() {
   	el=document.getElementById('logochg');
   	el.onmouseover=function() {
   	changeText('hide','show')
 	}
   	el.onmouseout=function() {
   	changeText('show','hide');
  	}
 	}
	function changeText(cl1,cl2) {
   document.getElementById('span1').className=cl1;
   document.getElementById('span2').className=cl2;
	}