var frmNum = 0
function document.body.onclick(){
	var obj = event.srcElement;
	if (obj.snap){
		if (obj.innerText=='[快照預覽]'){
			var iName = 'Iframe'+(frmNum++);
			obj.innerHTML = '[關閉快照]<span onClick="noLight(\''+iName+'\')"> [清除關鍵詞加亮]</span><br><iframe src="cache.php?url='+escape(obj.snap)+'" width="100%" height="300" style="border:1px solid #000" name="'+iName+'" onload="Light(this.name)"></iframe>'
		} else{
			obj.innerText = '[快照預覽]'
		}
	}
}

var KWD = document.forms[0].keywords.value;
KWD = KWD.replace(/[\$\(\)\*\+\.\[\?\\\^\{\|\/-<>"']/g,' ');//過濾特殊字符
KWD = KWD.replace(/ ( *)/g, ' ');//去除多空格
KWD = KWD.replace(/(^ * )?(.*)[ ]$/g,'$2');//去除兩端空格
KWD = KWD.split(' ');//轉為數組

function Light(Iframe){
	var aKWD,bodyHTML,Ibody;
	Iframe = eval(Iframe);
	Ibody = Iframe.document.body
	bodyHTML = Ibody.innerHTML;
	aKWD = /([^>]*)([^<]*)([^>]*)/gim;//設定過濾標簽
	for (var i in KWD){
		bodyHTML = bodyHTML.replace
		(aKWD,
		  function f2c($0,$1,$2,$3){
			aKWD0 = eval('/'+KWD[i]+'/gim;');
			return($1+$2.replace(aKWD0,'<b style="color: red; background-color: yellow" >'+KWD[i]+'</b>')+$3);
		  }
		);
	}
	Ibody.innerHTML = bodyHTML;
	Iframe.iDo = 'kc';
}

function noLight(Iframe){
	var obj = event.srcElement;
	Iframe = eval(Iframe);
	if (Iframe.iDo!='kc' || Iframe.location.href.indexOf('?url=')<0){return;}
	if (obj.iDo=='kc'){
		obj.innerText = ' [清除關鍵詞加亮]';
		obj.iDo = 'jn';
		Light(Iframe);
		return;
	}
	Ibody = Iframe.document.body
	Ibody.innerHTML = Ibody.innerHTML.replace(/(<b[^>]*>)([^\/]*)(<\/b>)/gim,"$2");
	obj.innerText = ' [點擊加亮關鍵詞]';
	obj.iDo = 'kc';
}