// JavaScript Document
//返回指定id名的对象
function $id(id)
{
	return document.getElementById(id);
}
//返回指定name名的对象
function $name(name)
{
	return document.getElementsByName(name);
}
//获取对象y坐标
function getY(e)
{
 var   obj   =   e; 
 var   getTop   =   obj.offsetTop;
 while(obj   =   obj.offsetParent) 
 {
    getTop   +=   obj.offsetTop;  
 }
 return getTop;
}
//获取对象x坐标
function getX(e)
{
 var   obj   =   e; 
 var   getLeft   =   obj.offsetLeft; 
 while(obj   =   obj.offsetParent) 
 {
    getLeft   +=   obj.offsetLeft; 
 }
 return getLeft;
}
//
function IEversion(){
	var arVersion = navigator.appVersion.split("MSIE");
    var version = parseFloat(arVersion[1]);
	return version;
}
//
//ie6 png透明
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
{
    
    if ((IEversion() >= 5.5 && IEversion() < 7) && (document.body.filters)) 
    {
       for(var j=0; j<document.images.length; j++)
       {
          var img = document.images[j]
          var imgName = img.src.toUpperCase()
          if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
          {
             var imgID = (img.id) ? "id='" + img.id + "' " : "";
             var imgClass = (img.className) ? "class='" + img.className + "' " : "";
             var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
             var imgStyle = "display:inline-block;" + img.style.cssText ;
             if (img.align == "left") imgStyle = "float:left;" + imgStyle;
             if (img.align == "right") imgStyle = "float:right;" + imgStyle;
             if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle;
             var strNewHTML = "<span " + imgID + imgClass + imgTitle
             + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
             + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
             + "(src=\'" + img.src + "\', sizingMethod='image');\"></span>" ;
             img.outerHTML = strNewHTML;
             j = j-1;
          }
       }
    }    
}
window.attachEvent("onload", correctPNG);
//--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//
function NumToLetter(str,ascii_dif){
	code   =   str.charCodeAt(0)  ;     
	return  String.fromCharCode(code+ascii_dif-32);
}

function changetxtcolor(f) {
	var obj=f.className;
	if(obj.indexOf('_red')==-1) {
		f.className+='_red';
		whotxtcolorchange=f.id;
	}
}

function restoretxtcolor(f) {
	var obj=f.className;
	var objid=f.id;
	if(whotxtcolorchange==objid) {
		var len=obj.length-4;
		f.className=obj.substr(0,len);	
	}
}

//浏览器判断函数
function typeof_browser()
{ 
    var OsObject = ""; 
	if(isIE=navigator.userAgent.indexOf("MSIE")>0) { 
        return 0; 
	} 
	if(isFirefox=navigator.userAgent.indexOf("Firefox")>0){ 
		return 1; 
	} 
   	if(isSafari=navigator.userAgent.indexOf("Safari")>0) { 
        return 2;
   	}  
   	if(isCamino=navigator.userAgent.indexOf("Camino")>0){ 
        return 3;
	} 
	if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0){ 
		return 4;
   	}
}

function check_ie_version(){
	var isIE=!!window.ActiveXObject;
	var isIE6=isIE&&!window.XMLHttpRequest;
	var isIE8=isIE&&!!document.documentMode;
	var isIE7=isIE&&!isIE6&&!isIE8;
	if (isIE){
		if (isIE6){
			return "ie6";
		}else if (isIE8){
			return "ie8";
		}else if (isIE7){			
			return "ie7";
		}
	}
}