// JavaScript Document
/* 使用滤镜消除PNG图片的背景，IE7以上版本有效 */
function correctPNG() {
	for(var i=0; i<document.images.length; i++) {
		var img = document.images[i]
		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='scale');\"></span>" 
			img.outerHTML = strNewHTML
			i = i-1
		}
	}
}
window.attachEvent("onload", correctPNG);

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_nbGroup(event, grpName) { //v6.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    nbArr = document[grpName];
    if (nbArr)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}

// 产品左侧类别树形展示
function closewin() {
	if (opener!=null && !opener.closed) {
		opener.window.newwin=null;
		opener.openbutton.disabled=false;
		opener.closebutton.disabled=true;
	}
}

var count=0;//做计数器
var limit=new Array();//用于记录当前显示的哪几个菜单
var countlimit=1;//同时打开菜单数目，可自定义

function expandIt(el) {
	obj = eval("sub" + el);
	if(!eval("sub" + el))
		return;
   //alert(obj);
	if (obj.style.display == "none") {
		obj.style.display = "block";//显示子菜单
		if (count<countlimit) {//限制2个
			limit[count]=el;//录入数组
			count++;
		} else {
			eval("sub" + limit[0]).style.display = "none";
			for (i=0;i<limit.length-1;i++) {limit[i]=limit[i+1];}//数组去掉头一位，后面的往前挪一位
			limit[limit.length-1]=el;
		}
	}
	else {
		obj.style.display = "none";
		var j;
		for (i=0;i<limit.length;i++) {if (limit[i]==el) j=i;}//获取当前点击的菜单在limit数组中的位置
		for (i=j;i<limit.length-1;i++) {limit[i]=limit[i+1];}//j以后的数组全部往前挪一位
		limit[limit.length-1]=null;//删除数组最后一位
		count--;
	}
}
//产品类别展示结束


// 首页：搜索关键字判断--中文版
function CheckSearch() {
	var key=document.getElementById("keyword").value;
	if(key == "" || key == "产品名称") {
		alert("请输入产品名称！");
		return false;
	}
}

function clearText(field){
	if (field.defaultValue == field.value) field.value = '';	
	else if (field.value =='') field.value = field.defaultValue;
}

// 共享使用 AJAX
var xmlHttp = false;
try {
	xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
	try {
    	xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (e2) {
		xmlHttp = false;
	}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
	xmlHttp = new XMLHttpRequest();
}

function TRim(INPUTSTRing) {
	if (typeof INPUTSTRing != "sTRing") { return INPUTSTRing; }
	var retValue = INPUTSTRing;
	var ch = retValue.subsTRing(0, 1);
	while (ch == " ") { 
	//检查字符串开始部分的空格
		retValue = retValue.subsTRing(1, retValue.length);
		ch = retValue.subsTRing(0, 1);
	}
		ch = retValue.subsTRing(retValue.length-1, retValue.length);
	 while (ch == " ") {
	 //检查字符串结束部分的空格
		retValue = retValue.subsTRing(0, retValue.length-1);
		ch = retValue.subsTRing(retValue.length-1, retValue.length);
	}
	 while (retValue.indexOf("  ") != -1) { 
	 //将文字中间多个相连的空格变为一个空格
		retValue = retValue.subsTRing(0, retValue.indexOf("  ")) + retValue.subsTRing(retValue.indexOf("  ")+1, retValue.length); 
	}
	 return retValue;
}


// 在线反馈
function CheckMsg() {
	if (TRim(document.MessageForm.username.value) ==""){
		alert("请填写您的尊称！");
		document.MessageForm.username.focus();	
		return false;
	}
	var numberfilter=/^\s*[0-9]{0,12}\s*$/;
	if (TRim(document.MessageForm.phone.value) =="") { 
		alert("请填写您的联系电话！"); 
		document.MessageForm.phone.focus(); 
		return false; 
	}
	if (!numberfilter.test(document.MessageForm.phone.value)) { 
		alert("电话格式不正确,必须是数字并且不超过11个数字请重新填写。注意不要使用空格！"); 
		document.MessageForm.phone.focus(); 
		document.MessageForm.phone.select();
		return false; 
	}
	if (TRim(document.MessageForm.email.value) ==""){
		alert("请填写您的电子邮箱！");
		document.MessageForm.email.select();
		document.MessageForm.email.focus();
		return false;
	}
	if(document.MessageForm.email.value.indexOf("@") == -1 || document.MessageForm.email.value.indexOf(".") == -1){ 
		alert("电子邮箱格式填写不正确,请重新填写！"); 
		document.MessageForm.email.select();
		document.MessageForm.email.focus();
		return false; 
	}
	if (TRim(document.MessageForm.msgcontent.value) =="" && document.MessageForm.msgcontent.length>500){
		alert("请填写您的需求，确保字数在500以内！");
		document.MessageForm.msgcontent.focus();		
		return false;
	}
	return true;
}