//Esconder a div
function EscondeDivCarregador(){
	var objLoader				= document.getElementById("carregador_pai");
	var objLoader1				= document.getElementById("carregador");
//	objLoader.style.display		="none";
	objLoader1.style.visibility	="hidden";
	objLoader.style.visibility	="hidden";

}
function EscondeDivLogin(){
	var objLoader				= document.getElementById("carregador_pai");
	var objLoader1				= document.getElementById("login");
//	objLoader.style.display		="none";
	objLoader1.style.visibility	="hidden";
	objLoader.style.visibility	="hidden";
	document.form_login.senha.value='';
	document.getElementById("caixa_login_erro").innerHTML='';
	document.getElementById("caixa_senha_erro").innerHTML='';
}
//Aparecer a div
function AparecerDivCarregador(){
	var objLoader = document.getElementById("carregador_pai");
	var objLoader1= document.getElementById("carregador");
	
	var size_width= document.body.clientWidth;
	var size_height=document.body.clientHeight;	
		
	objLoader.style.width	=size_width+'px';
	objLoader.style.height	=size_height+'px';
	
	var div_carregador_width=objLoader1.offsetWidth/2;
	
	var centro_width=((parseInt(size_width/2))-div_carregador_width);

	objLoader1.style.left=centro_width+'px';

	
	var div_carregador_height=objLoader1.offsetHeight/2;
	
	var centro_height=((parseInt(size_height/2))-div_carregador_height);
	objLoader1.style.top=centro_height+'px';
	
	objLoader.style.visibility	="visible";
	objLoader1.style.visibility	="visible";	
}
function AparecerDivLogin(){
	var objLoader = document.getElementById("carregador_pai");
	var objLoader1= document.getElementById("login");
	
	var size_width= document.body.clientWidth;
	var size_height=document.body.clientHeight;	
		
	objLoader.style.width	=size_width+'px';
	objLoader.style.height	=size_height+'px';
	
	var div_carregador_width=objLoader1.offsetWidth/2;
	
	var centro_width=((parseInt(size_width/2))-div_carregador_width);

	objLoader1.style.left=centro_width+'px';

	
	var div_carregador_height=objLoader1.offsetHeight/2;
	
	var centro_height=((parseInt(size_height/2))-div_carregador_height);
	objLoader1.style.top=centro_height+'px';
	
	objLoader.style.visibility	="visible";
	objLoader1.style.visibility	="visible";	
	
	if ((document.form_login.login.value.length==0)||(document.form_login.value==' ')){
		document.form_login.login.focus();
	}else{
		document.form_login.senha.focus();
}
}

//caixa de login
function valida_login() {
	  with(document.form_login) {
		if(login.value=='' || login.value==' ' || login.length==0){
			document.getElementById("caixa_senha_erro").innerHTML='';
			document.getElementById("caixa_login_erro").innerHTML='<img src=\"imagens/caixa_login_alerta.jpg\" width=\"20\" height=\"22\">'
			login.focus();
		}else if(senha.value=='' || senha.value==' ' || senha.length==0){
			document.getElementById("caixa_login_erro").innerHTML='';
			document.getElementById("caixa_senha_erro").innerHTML='<img src=\"imagens/caixa_login_alerta.jpg\" width=\"20\" height=\"22\">'
			senha.focus();
		}else{
			document.getElementById("caixa_login_erro").innerHTML='';
			document.getElementById("caixa_senha_erro").innerHTML='';
			document.form_login.action='sistema/sgc/index.asp';
			submit();		
				
		}	
	  }
	 }
	 
//Desabilita o enter para enviar o relatório, fazendo com que o enter
//funcione como a tecla TAB.
  function handleEnter (field, event) {
        var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
        if (keyCode == 13) {
            var i;
            for (i = 0; i < field.form.elements.length; i++)
                if (field == field.form.elements[i])
                    break;
            i = (i + 1) % field.form.elements.length;
            field.form.elements[i].focus();
            return false;
        }else if(keyCode==27){
		EscondeDivLogin();
		document.form.Usuario.focus();
		}else
        return true;
    }
//Enter envia o formulário
function Enter(field, event){
	var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode; 
	if(keyCode==13){
	   	valida_login();
	}else if(keyCode==27){
		EscondeDivLogin();
		document.form.Usuario.focus();
	}
}