// 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);



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

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


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;
}

// 客户留言
function CheckMsg() {
	if (TRim(document.getElementById("title").value) ==""){
		alert("请选择应聘职位！");
		document.getElementById("title").focus();
		return false;
	}
	if (TRim(document.getElementById("username").value) ==""){
		alert("请填写您的姓名！");
		document.getElementById("username").focus();
		return false;
	}
	var numberfilter=/^\s*[0-9]{0,11}\s*$/;
	if(TRim(document.getElementById("phone").value) == ""){
		alert('请输入您的联系电话！');
		document.getElementById("phone").focus();
		return false;
	}
	if (!numberfilter.test(document.getElementById("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.getElementById("phone").focus();
		document.getElementById("phone").select();
		return false; 
	}
	if (TRim(document.getElementById("email").value) ==""){
		alert("请填写您的电子邮箱！");
		document.getElementById("email").focus();
		return false;
	}
	if(document.getElementById("email").value.indexOf("@") == -1 || document.getElementById("email").value.indexOf(".") == -1){ 
		alert("电子邮箱格式填写不正确,请重新填写！"); 
		document.getElementById("email").select();
		document.getElementById("email").focus();
		return false; 
	}
/*	if (TRim(document.getElementById("upfile").value) ==""){
		alert("上传个人简历附件，请选择扩展名为 doc/pdf/zip/xls 的文件格式上传！！");
		document.getElementById("upfile").focus();
		return false;
	}*/
	return true;
}