if (document.all) {  
	window.attachEvent('onload', initFormEvent);
} else {  
	window.addEventListener('load', initFormEvent, false);
}

function clears(){
	$('#email1').val('');
	$('#password').val('');
}

function initFormEvent(){
	var frm_login = document.getElementById("login_form");
	var email = frm_login.email;
	email.focus();
	regEnter2Next(window.document.getElementById("email"),window.document.getElementById("password"));
	regEnter(document.getElementById("password"));
}

function login(){
	var frm_login = document.getElementById("login_form");
	if( frm_login.email.value=="" ){
		document.getElementById("loginTip").innerHTML="<font color='red'>请输入帐号。</font>";
		frm_login.email.focus();
	} else if( frm_login.password.value=="" ){
		document.getElementById("loginTip").innerHTML="<font color='red'>请输入密码。</font>";
		frm_login.password.focus();
	} else {
		$('#loginTip').html("请稍候，正在检查用户合户性......");
		frm_login.submit();
	}
}

var shiftkeydown=false;

function enterKeyToTabKey(){
	if(event.keyCode==13 ){
          if (event.srcElement.type && event.srcElement.type=="link"){
            return;
          }
           event.keyCode=9;
	}
    if(event.keyCode==16){
     shiftkeydown=true;
    }
}

function getshiftkeyup() {

  if (event.keyCode==16) {
    shiftkeydown=false;
  }
}

function regEnter2Next(aBlur, nextFocus){
    var oldMethod = aBlur.onkeydown;
    aBlur.onkeydown = function(){
        if (((event.keyCode == 9 && !shiftkeydown)|| event.keyCode==13) ){// tab key down ,enter key down
        	if( nextFocus.length ){
        		nextFocus[0].focus();
            	if(nextFocus[0].select){
                	nextFocus[0].select();
            	}
        	} else {
            	nextFocus.focus();
            	if(nextFocus.select){
                	nextFocus.select();
            	}
            }
            event.returnValue=false;
        }
        else if(oldMethod){
            oldMethod();
        }
    }
}


function regEnter(aBlur){
    var oldMethod = aBlur.onkeydown;
    aBlur.onkeydown = function(){
        if ( event.keyCode==13 ){// tab key down ,enter key down
        	login(event);
            event.returnValue=false;
        }
        else if(oldMethod){
            oldMethod();
        }
    }
}



function showIntroPage(tab){
	for(var i=1; i<=3; i++){
		document.getElementById("intro_page_tab_"+i).style.backgroundColor="#e5e5e5";
		document.getElementById("intro_page_tab_"+i).style.borderTopWidth="1px";
		document.getElementById("intro_page_"+i).style.display="none";
	}
	
	document.getElementById("intro_page_tab_"+tab).style.backgroundColor="#F8BA4C";
	document.getElementById("intro_page_tab_"+tab).style.borderTopWidth="2px";
	document.getElementById("intro_page_"+tab).style.display="";
}