function hl(c){
//	if(typeof wh == "undefined")
//		wh = "y";
	var colors = [];
	colors.y = ['#fff', '#ffa'];
	colors.bl = ['#fff', '#cff'];

	var elems=document.querySelectorAll('.bl,.y');
	var i=0,l=elems.length;
    for (;i<l;i++) {
		var name = elems[i].className;
        elems[i].style.background = colors[name][c];
    }
}