function CheckEmpty(Field, FieldTitle)

	{

		if (Field.value == "")

		{

			alert("请在\"" + FieldTitle + "\"中输入值.");

			Field.focus();

			return false;

		}		

		return true;

	}	

	

	function CheckEmpty2(Field)

	{

		if (Field.value == "")

		{

			return false;

		}		

		return true;

	}

	

	function CheckInteger(Field, FieldTitle)

	{

		if (Field.value != "")

		{

			for (i = 0; i < Field.value.length; i++)

			{

				ch = Field.value.charAt(i);

				if ( (ch < '0' || ch > '9') && ch != '-' ) {

					alert("\"" + FieldTitle + "\"中只能输入数字.");

					Field.focus();

					return	false;

				}

			}

		}

		

		return true;

	}

	

	function CheckReal(Field, FieldTitle)

	{

		if (Field.value != "")

		{

			DotNum = 0;

			for (i = 0; i < Field.value.length;  i++)

			{

				ch = Field.value.charAt(i);

				

				if ((ch < '0' || ch > '9') && ch != '.') 

				{

					alert("\"" + FieldTitle + "\"中只能输入数字.");

					Field.focus();

					return false;

				}

				

				if (ch == '.')

				{

					if (DotNum > 0) 

					{

						alert("\"" + FieldTitle + "\"中只能输入一个小数点.");

						Field.focus();

						DotNum++;

						return false;

					}

				}

			}

		}

		

		return	true;

	}



	function CheckMaxLength(Field, MaxLength, FieldTitle)

	{

		if (Field.value != "")

		{

			if (Field.value.length > MaxLength)

			{

				alert("\"" + FieldTitle + "\"中输入的字符请不要超过" + MaxLength + "字符.");

				Field.focus();

				return false;

			}

		}

		

		return true;

	}

	

	function CheckOption(Field, FieldTitle) 

	{

		for (i = 0; i < Field.length; i++)

			if (Field[i].checked)

				return true;				

		alert("请选择\"" + FieldTitle + "\"中的值.");

		return false;

	}



	//此函数用于判断Email地址是否正确

function CheckEmail(Field)

{



   // there must be >= 1 character before @, so we

   // start looking at character position 1

   // (i.e. second character)

   var i = 1;

   var len = Field.value.length;



	if (len > 50)

	{

		window.alert("email地址长度不能超过50位!");

		return false;

	}

	

	pos1 = Field.value.indexOf("@");

	pos2 = Field.value.indexOf(".");

	pos3 = Field.value.lastIndexOf("@");

	pos4 = Field.value.lastIndexOf(".");

	//check '@' and '.' is not first or last character

	if ((pos1 <= 0)||(pos1 == len-1)||(pos2 <= 0)||(pos2 == len-1))  

	{

		window.alert("请输入有效的E-mail地址！");

		return false;

	}

	else

	{

		//check @. or .@

		if( (pos1 == pos2 - 1) || (pos1 == pos2 + 1) 

		  || ( pos1 != pos3 )  //find two @

		  || ( pos4 < pos3 ) ) //. should behind the '@'  		

		{

			window.alert("请输入有效的E-mail地址！");

			return false;

		}

	}

	return true;

}





function CheckMinLength(Field, MinLength, FieldTitle)

	{

		if (Field.value != "")

		{

			if (Field.value.length < MinLength)

			{

				alert("\"" + FieldTitle + "\"中输入的字符请不要少于" + MinLength + "字符.");

				Field.focus();

				return false;

			}

		}

		

		return true;

	}



	function CheckField(Field, FieldTitle)

	{

		if (Field.value != "")

		{

			for (i = 0; i < Field.value.length; i++)

			{ 

				var ch2

				ch = Field.value.charAt(i);

				ch2 = Field.value.charCodeAt(i);

				

					if(eval(ch2 - 0x80) >= 0) 

					{   

						

					}

					else

					{

						if ( (ch < '0' || ch > '9') && ch != '-' && ch!='_' &&(ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') ) 

						{

							alert("\"" + FieldTitle + "\"中只能输入中文字符、字母和数字或下划线.");

							Field.focus();

							return	false;

						}

					}

			}

		}

		

		return true;

	}

function CheckAgain(Field, FieldTitle)

{

	if (Field.value != "")

		{

		var temp;

		pos1 = Field.value.indexOf("@");		

		temp=Field.value.substring(1,pos1-1);		

		for (i = 0; i < temp.length; i++){

      	  ch = temp.charAt(i);			

		  if ( (ch < '0' || ch > '9') && ch != '-' && ch!='_' &&(ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') ) {

			alert("\"" + FieldTitle + "\"中只能输入字母和数字或下划线.");

			Field.focus();

			return	false;

			}	

		}

	}

		

	return true;

}



function checkSele(field,fieldname)	{

 if(field.value==0){

   alert("请选择您的"+fieldname);

   field.focus();

   return false;}   

 return true;   

}	

/*name sex  birth nation workyears officeyears 

degree  school  major  workcorp headship 

address  zipcode  tel_off  tel_fam  tel_mobile

leader_show leader_skill corp_status  corp_product 

corp_active  corp_capital corp_tribute self_credit  corp_opinion */		





function Check(theForm)

{   	

    if (!CheckEmpty(theForm.name, "姓名"))				return false;	   

    if (!CheckEmpty(theForm.birth_year, "出生年"))				return false;

    if (!CheckEmpty(theForm.ID, "身份证"))				return false;

	if (!CheckEmpty(theForm.email, "email"))				return false;

		

 }