var imgList = new Array();

function preLoad(){
	imgList['sNormal'] = new Image();
	imgList['sNormal'].src = '/images/search_btn_01.gif';
	imgList['sOver'] = new Image();
	imgList['sOver'].src = '/images/search_btn_01_o.gif';
	imgList['sActive'] = new Image();
	imgList['sActive'].src = '/images/search_btn_01_a.gif';
	imgList['sFocus'] = new Image();
	imgList['sFocus'].src = '/images/search_btn_01_f.gif';
}

if(document.images)preLoad();


function rollover(target,state) {
	if(!document.images)return;

	if (!target._state) {
		target._state = new Object;
	}
	var status = target._state;

	switch (state) {
		case 'mouseover' :
			status.over   = true;
			break;
		case 'mousedown' :
			status.active = true;
			break;
		case 'mouseup' :
			status.active = false;
			break;
		case 'mouseout' :
			status.over   = false;
			status.active = false;
			break;
		case 'focus' :
			status.focus  = true;
			break;
		case 'keydown' :
			status.active = true;
			break;
		case 'keyup' :
			status.active = false;
			break;
		case 'blur' :
			status.focus  = false;
			status.active = false;
			break;
	}

	var newSrc = "";
	if (status.active) {
		newSrc = imgList['sActive'].src;
	} else if (status.over) {
		newSrc = imgList['sOver'].src;
	} else if (status.focus) {
		newSrc = imgList['sFocus'].src;
	} else {
		newSrc = imgList['sNormal'].src;
	}

	target.src = newSrc;
}