function write_check()
{
	if ( document.myform.username.value == "") {
		alert("请输入用户名");
		document.myform.username.focus();
		return ;
	}
	if ( document.myform.userpassword.value == "") {
		alert("请输入密码");
		document.myform.userpassword.focus();
		return ;
	}
	if ( document.myform.newstitle.value == "") {
		alert("请输入标题");
		document.myform.newstitle.focus();
		return ;
	}
	if ( document.myform.newscontent.value == "") {
		alert("请输入内容");
		document.myform.newscontent.focus();
		return ;
	}
	myform.submit();
}

function t1(){
	document.getElementById('chongzhi').style.display='';
	document.getElementById('zhanghao').style.display='none';
	document.getElementById('daili').style.display='none';	
	
	document.getElementById('c1').className='tet_FFFFFF1';
	document.getElementById('c2').className='tet_CC33331';
	document.getElementById('c3').className='tet_CC33331';
}

function t2(){
	document.getElementById('chongzhi').style.display='none';
	document.getElementById('zhanghao').style.display='';
	document.getElementById('daili').style.display='none';
	
	document.getElementById('c1').className='tet_CC33331';
	document.getElementById('c2').className='tet_FFFFFF1';
	document.getElementById('c3').className='tet_CC33331';
}

function t3(){
	document.getElementById('chongzhi').style.display='none';
	document.getElementById('zhanghao').style.display='none';
	document.getElementById('daili').style.display='';
	
	document.getElementById('c1').className='tet_CC33331';
	document.getElementById('c2').className='tet_CC33331';
	document.getElementById('c3').className='tet_FFFFFF1';
}


function pd_login()
{
	if ( document.myform.UsersName.value=="") 
	{
		alert("ID를 입력하세요");
		document.myform.UsersName.focus();
		return ;
	}
	if ( document.myform.UsersPassword.value=="") 
	{
		alert("비밀번호를 입력하세요.");
		document.myform.UsersPassword.focus();
		return ;
	}
	myform.submit();
}


function pict_write()
{
	if ( document.myform.newstitle.value == "") {
		alert("제목을 입력하세요");
		document.myform.newstitle.focus();
		return ;
	}
	if ( document.myform.newscontent.value == "") {
		alert("내용을 입력하세요");
		document.myform.newscontent.focus();
		return ;
	}
	if ( document.myform.p1.value=="" && document.myform.p2.value=="") 
	{
		alert("사진을 첨부하세요");
		document.myform.p1.focus();
		return ;
	}
	if (document.myform.p1.value!="")
	{
			 var ss=document.all("p1").value;   
			 var ssary=new   Array();   
			 ssary=ss.split(".");  
			 if(ssary[ssary.length-1]=="gif"||ssary[ssary.length-1]=="jpg"||ssary[ssary.length-1]=="bmp"||ssary[ssary.length-1]=="BMP"||ssary[ssary.length-1]=="GIF"||ssary[ssary.length-1]=="JPG"||ssary[ssary.length-1]=="jpeg"||ssary[ssary.length-1]=="JPEG")
			 {   
			 }
			 else
			 {   
				alert("허용되지 않는 사진 격식입니다");   
				document.myform.p1.focus();
				return;   
			 }         
	}
	if (document.myform.p2.value!="")
	{
			 var ss=document.all("p2").value;   
			 var ssary=new   Array();   
			 ssary=ss.split(".");  
			 if(ssary[ssary.length-1]=="gif"||ssary[ssary.length-1]=="jpg"||ssary[ssary.length-1]=="bmp"||ssary[ssary.length-1]=="BMP"||ssary[ssary.length-1]=="GIF"||ssary[ssary.length-1]=="JPG"||ssary[ssary.length-1]=="jpeg"||ssary[ssary.length-1]=="JPEG")
			 {   
			 }
			 else
			 {   
				alert("허용되지 않는 사진 격식입니다");   
				document.myform.p2.focus();
				return;   
			 }         
	}
	myform.submit();
}



function pict_write1()
{
	if ( document.myform.newstitle.value == "") {
		alert("제목을 입력하세요");
		document.myform.newstitle.focus();
		return ;
	}
	if ( document.myform.newscontent.value == "") {
		alert("내용을 입력하세요");
		document.myform.newscontent.focus();
		return ;
	}
	if (document.myform.p1.value!="")
	{
			 var ss=document.all("p1").value;   
			 var ssary=new   Array();   
			 ssary=ss.split(".");  
			 if(ssary[ssary.length-1]=="gif"||ssary[ssary.length-1]=="jpg"||ssary[ssary.length-1]=="bmp"||ssary[ssary.length-1]=="BMP"||ssary[ssary.length-1]=="GIF"||ssary[ssary.length-1]=="JPG"||ssary[ssary.length-1]=="jpeg"||ssary[ssary.length-1]=="JPEG")
			 {   
			 }
			 else
			 {   
				alert("허용되지 않는 사진 격식입니다");   
				document.myform.p1.focus();
				return;   
			 }         
	}
	if (document.myform.p2.value!="")
	{
			 var ss=document.all("p2").value;   
			 var ssary=new   Array();   
			 ssary=ss.split(".");  
			 if(ssary[ssary.length-1]=="gif"||ssary[ssary.length-1]=="jpg"||ssary[ssary.length-1]=="bmp"||ssary[ssary.length-1]=="BMP"||ssary[ssary.length-1]=="GIF"||ssary[ssary.length-1]=="JPG"||ssary[ssary.length-1]=="jpeg"||ssary[ssary.length-1]=="JPEG")
			 {   
			 }
			 else
			 {   
				alert("허용되지 않는 사진 격식입니다");   
				document.myform.p2.focus();
				return;   
			 }         
	}
	myform.submit();
}





function find_pws()
{
	if ( document.myform.UsersName.value == "") {
		alert("ID를 입력하세요");
		document.myform.UsersName.focus();
		return ;
	}
	if ( document.myform.UsersProblems.value == "") {
		alert("비밀번호 분실시 질문을 선택하세요");
		document.myform.UsersProblems.focus();
		return ;
	}
	if ( document.myform.UsersAnswer.value == "") {
		alert("비밀번호 분실시 답변을 입력하세요");
		document.myform.UsersAnswer.focus();
		return ;
	}
	myform.submit();
}

function find_name()
{
	if ( document.myform.UsersEmail.value == "") {
		alert("E-Mail주소를 입력하세요");
		document.myform.UsersEmail.focus();
		return ;
	}
	if ( document.myform.UsersProblems.value == "") {
		alert("비밀번호 분실시 질문을 선택하세요");
		document.myform.UsersProblems.focus();
		return ;
	}
	if ( document.myform.UsersAnswer.value == "") {
		alert("비밀번호 분실시 답변을 입력하세요");
		document.myform.UsersAnswer.focus();
		return ;
	}
	myform.submit();
}


function check_mail(str)
{
	emailEx1 = /[^@]+@[A-Za-z0-9_-]+.[A-Za-z]+/;
	emailEx2 = /[^@]+@[A-Za-z0-9_-]+.[A-Za-z0-9_-]+.[A-Za-z]+/;
	emailEx3 = /[^@]+@[A-Za-z0-9_-]+.[A-Za-z0-9_-]+.[A-Za-z0-9_-]+.[A-Za-z]+/;

	if(emailEx1.test(str)) return true;
	if(emailEx2.test(str)) return true;
	if(emailEx3.test(str)) return true;

	return false;
}