var	preloadFlag = false;

function loadImage(name, src) {
  eval(name + " = new Image();");
  eval(name + '.src = "'+src+'";');
}

function changeImage(dpic, pic) {
  if (document.images && (preloadFlag == true))
    eval("document.images['"+dpic+"'].src="+pic+".src;");
}

function enable(what) {
  changeImage(what, what+'_');
}

function disable(what) {
  changeImage(what, what);
}	

function loadAll(){

	preloadFlag = true;	
}

function leftEnable(item){
	item.style.backgroundColor= 'DFDFDF';
}

function leftDisable(item){
	item.style.backgroundColor= '';
}