//关键字高亮
function searchhighlight(idval, keyword)  { 
	var pucl = document.getelementbyid(idval); 
	if ("" == keyword) {
		return; 
	}
	var temp = pucl.innerhtml; 
	var htmlreg = new regexp("\<.*?\>","i"); 
	var arra = new array(); 
	
	//替换html标签 
	for (var i=0; true; i++) { 
		var m = htmlreg.exec(temp); 
		if (m) { 
			arra[i]=m; 
		} else { 
			break; 
		} 
		temp = temp.replace(m,"{[("+i+")]}"); 
	} 
	words = unescape(keyword.replace(/\+/g,' ')).split(/\s+/); 
	
	//替换关键字 
	for (w=0; w<words.length; w++) { 
		var r = new regexp("("+words[w].replace(/[(){}.+*?^$|\\\[\]]/g, "\\$&")+")","ig"); 
		temp = temp.replace(r,"<b style='color:red;'>$1</b>"); 
	} 
	
	//恢复html标签 
	for(var i=0; i<arra.length; i++) { 
		temp = temp.replace("{[("+i+")]}",arra[i]); 
	} 
	pucl.innerhtml = temp; 
}

function get_scrolltop_of_body(){
	var scrolltop;
	if (typeof window.pageyoffset != 'undefined') {
		scrolltop = window.pageyoffset;
	} else if (
		typeof document.compatmode != 'undefined' 
		&& document.compatmode != 'backcompat')
	{
		scrolltop = document.documentelement.scrolltop;
	} else if (typeof document.body != 'undefined') {
		scrolltop = document.body.scrolltop;
	}
	return scrolltop;
}