/* 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);

	/* 产品详细页面 通用 */
	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 change_layer_a(src){
		if(document.getElementById("imgsrc").src!=src) {
			document.getElementById("imgsrc").src=src
		}
	}


	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;
	}


	// 搜索关键字判断--中文版
	function CheckSearch() {
		var key=document.SearchForm.Keyword.value;
		if(key == "" || key == "关键字") {
			alert("请输入关键字！");
			return false;
		}
		return true;
	}
	
	function clearText(field){
		if (field.defaultValue == field.value) field.value = '';	
		else if (field.value =='') field.value = field.defaultValue;
	}


	// 搜索关键字判断--A
	function CheckSearchA() {
		var Title =document.SearchFormA.Title.value;
		var CodeID=document.SearchFormA.CodeID.value;
		if(Title == "" && CodeID == "") {
			alert("请在颜色或索引号中任选一项进行查询！");
			return false;
		}
		return true;
	}


	// 搜索关键字判断--B
	function CheckSearchB() {
		if(document.SearchFormB.CASID.value == "") {
			alert("请输入CAS登记号！");
			document.SearchFormB.CASID.focus();
			return false;
		}
		return true;
	}


	// 搜索关键字判断--C
	function CheckSearchC() {
		if(document.SearchFormC.Remark.value == "") {
			alert("请选择用途！");
			return false;
		}
		return true;
	}
	
	
	function CheckMsgForm() {
		if(TRim(document.MessageForm.username.value) == "") {
			alert("请输入您的姓名！");
			document.MessageForm.username.focus();
			return false;
		}
		if (TRim(document.MessageForm.email.value) == ""){
			alert('请输入您的电子邮件！');
			document.MessageForm.email.focus();
			return false;
		}
		if (document.MessageForm.email.value.indexOf("@")==-1|document.MessageForm.email.value.indexOf(".")==-1){
			alert("请输入正确的电子邮件！");
			document.MessageForm.email.focus();
			return false;
		}
		var numberfilter=/^\s*[0-9]{0,11}\s*$/;
		if(TRim(document.MessageForm.phone.value) == ""){
			alert('请输入您的联系电话！');
			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.msgcontent.value) == "") {
			alert("请输入内容！");
			document.MessageForm.msgcontent.focus();
			return false;
		}
		return true;
	}