// JavaScript Document
function trim(inputString) 
{
	var returnString = inputString;
	var removeChar = ' ';
	if(removeChar.length)
	{
		  while(''+returnString.charAt(0)==removeChar)
		  {
			  returnString=returnString.substring(1,returnString.length);
		  }
		  while(''+returnString.charAt(returnString.length-1)==removeChar)
		  {
			  returnString=returnString.substring(0,returnString.length-1);
		  }
	}
	return returnString;
}


function isNull(obj,str)
{
	if(trim(obj.value)=="")
	{
	    alert(str);
		obj.focus();
		return true;
	}
	return false
}

function checkPass(p1,p2,str)
{
	if(p1.value!=p2.value)
	{
		alert(str);
		p1.focus();
		return false;
	}
	return true;
}

function check_email(obj)
{
	if(obj.value!=""||obj.value.lastIndexOf('.')!=-1)
              if(obj.value.length - obj.value.lastIndexOf('.')==3&&obj.value.lastIndexOf('.')==obj.value.indexOf('.'))
                mod= "^([0-9a-zA-Z_]{1,20}@[0-9a-zA-Z-]{2,10}[.]{1}cn)$";
              else if(obj.value.length - obj.value.lastIndexOf('.')==3)
	            mod = "^([0-9a-zA-Z_]{1,20}@[0-9a-zA-Z-]{2,10}[.]{1}(com|net|edu|org|gov){1})[.]{1}[a-zA-Z]{2}$";
              else
                mod = "^([0-9a-zA-Z_]{1,20}@[0-9a-zA-Z-]{2,10}[.]{1}(com|net|org|gov|edu){1})$";
            else
            {
               alert("请输入正确的E-mail地址，如：xxx@sina.com.cn或xxx@163.com");
			   obj.focus();
               return false;
            }
            var reg = new RegExp(mod);
            if(!reg.test(obj.value))
            {
               alert("请输入正确的E-mail地址，如：xxx@sina.com.cn或xxx@163.com");
			   obj.focus();
               return false;
            }
			return true;
}

function checkCode(obj,str)
{
	 var reg = new RegExp("^[0-9a-zA-Z_]{6,10}$");
			if(!reg.test(obj.value))
			{
			     alert(str);
				 obj.focus();
                 return false;
			}
			return true;
}

function chk(check,id){
	 var objEvent = document.getElementById(id);
	 var checks = objEvent.getElementsByTagName("INPUT");
	 for(var i=0; i<checks.length; i++)
	 {
		if(checks[i].type=="checkbox"&&checks[i]!=check)
		{
			checks[i].checked = check.checked;
		}
	 }
}

function clock(){
  now = new Date();
  date = now.getDate();
  month = now.getMonth()+1;
  year = now.getYear();
  day = now.getDay();
  switch(day)
  {
    case 0:day="星期日";break;
	case 1:day="星期一";break;
	case 2:day="星期二";break;
	case 3:day="星期三";break;
	case 4:day="星期四";break;
	case 5:day="星期五";break;
	case 6:day="星期六";break;
	}
   document.write(year+"年"+month+"月"+date+"日"+" "+day);
}

function setoption(pid,sid,obj){
	var selectObj = document.getElementById(sid);
	selectObj.options.length=1;
	for(var i=0;i<obj.length;i++){
		if(obj[i][1]==pid){
			selectObj.options.add(new Option(obj[i][2],obj[i][0]));
		}
	}
}

function getDicName(id,obj)
{
	for(var i=0;i<obj.length;i++){
		if(obj[i][0]==id)
		{
			return obj[i][2];
		}
	}
	
	return "";
}

function checkImg(img,size)
{
	var obj = document.getElementById(img);
	var value =obj.value;
	var msg = "图片超出指定大小："+parseInt(size/1024)+"K";
	if(value!=""&&value.lastIndexOf(".")!=-1)
	{
		var type = value.substring(value.lastIndexOf(".")+1).toLowerCase();
		if(type=="jpg"||type=="gif"||type=="png")
		{
			if(document.all)
			{
				var img = document.createElement("img");
				img.src = value;
				if(img.fileSize==-1)
				{
					img.onreadystatechange = function() {
						if(this.readyState == 4 || this.readyState == 'complete' || this.readyState == 'loaded') {
							if(img.fileSize>size)
							{
								alert(msg);
								return false;
							}
						}
					};
				}
				else
				{
					if(img.fileSize>size)
					{
						alert(msg);
						return false;
					}
				}
			}
			else
			{
				if(obj.files[0].fileSize>size)
				{
					alert(msg);
					return false;
				}
			}
		}
		else
		{
			alert("请选择jpg、gif、png格式的图片");
			return false;
		}
	}
	return true;
}