/*
HTMLDivElement.prototype.getElementsByClass = function(tagName, className){  
	var selectedDivs = new Array();
	var divs = this.getElementsByTagName(tagName);
	for(var i=0; i<divs.length; i++){
		if(divs[i].className != className) continue;
		selectedDivs[selectedDivs.length] = divs[i];
	}
	return selectedDivs;
}
*/


function getElementsByClass(s, tagName, className){
	var selectedDivs = new Array();
	var divs = s.getElementsByTagName(tagName);
	for(var i=0; i<divs.length; i++){
		if(divs[i].className != className) continue;
		selectedDivs[selectedDivs.length] = divs[i];
	}
	return selectedDivs;
}

function switchTab(s){
    var tabs = s.parentNode.getElementsByTagName("LI");
    var blks = getElementsByClass(s.parentNode.parentNode.parentNode, "DIV", "body");
    
    for(var i=0; i<tabs.length; i++){
        if(tabs[i] == s){
            tabs[i].className = "hot";
            blks[i].style.display = "block";
        }
        else{
            tabs[i].className = "";
            blks[i].style.display = "none";
        }
    }
}


function search(val)
{   
    window.location.href="../article/searchresult.me?keyword="+val;

}

function $$(){
	var elements = new Array();
	var ii = arguments.length;
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string') 
			element = document.getElementById(element);
		if (arguments.length == 1) { return element; }
		elements.push(element);
	}
	return elements;
}
function doZoom(size)
{
	$$('changefont').style.fontSize = size + 'px'
}
function reColor(color) 
{ 
    $$('changefont').style.color = color;
} 



function showPic(items,id)
{
	var isIE = (document.all) ? true : false;
    var isIE7 = isIE && (navigator.userAgent.indexOf('MSIE 7.0') != -1); 
    var isIE8 = isIE && (navigator.userAgent.indexOf('MSIE 8.0') != -1); 

    var file=items;
    if(isIE7 || isIE8)
    { 
        file.select();
        var path=document.selection.createRange().text; 
        document.selection.empty(); 
		alert(path);
		alert(document.getElementById(id).alt);
		document.getElementById(id).src=path;
    }
}

function weizhi()
{
   var aWidth = window.screen.availWidth; //   获取客户端分辨率的宽度
    var aHeight = window.screen.availHeight; //   获取客户端分辨率的高度
  
    var sWidth = document.body.scrollWidth; //    获取浏览器的宽度
    var sHeight = document.body.scrollHeight; //    获取浏览器的高度

    var tWidth = sWidth - aWidth;
    var tHeight = sHeight - aHeight+750;
    window.scrollTo((tWidth / 2), (tHeight / 2));


}