function mouseover(t){
	var newmouseover;
	if(t.onmouseover){
		t.oldmouseover=t.onmouseover;
		newmouseover=function(){this.src=this.getAttribute("srcover");this.oldmouseover();}
	}
	else{newmouseover=function(){this.src=this.getAttribute("srcover");}}
	t.onmouseover=newmouseover;
}