function validar_form(frm){
	var campoSenha;
	var campoConfSenha;
	for ( i = 0; i <= frm.elements.length; i++ ) {
		campo = frm.elements[i];
      
		if ((campo.name == 'Dt_DataInicio') || (campo.name == 'Dt_DataTermino'))
		{ 
			if (isDate(campo.value)==false)
			{
				alert('Data incorreta. Por favor preencha a data no formato dd/mm/aaaa.');
				campo.focus();
				return false;
			}
		}
			
		if (campo.title){
      
         if (campo.type == 'select-one')
         {
            if (campo.selectedIndex == 0) {
				alert('Por favor, preencha o campo ' + campo.title + '.');
				campo.focus();
				return false;
			   }         
         }
         
         if (campo.type == 'textarea')
         {

            
            var ed = tinyMCE.get(campo.name);
            
            if (ed.getContent() == "") {
               alert('Por favor, preencha o campo ' + campo.title + '.')
               return false;
            }       
         }
      
         if (campo.type == 'text')
         {
   			if (campo.name != 'Tx_logo_midia')
				{
					if (!campo.value) {
   					alert('Por favor, preencha o campo ' + campo.title + '.');
   					campo.focus();
   					return false;
					}
   			}
         }  
			//no atributo lang são guardados os caracteres obrigatórios para o campo, todos separados
			// por ;
			if (campo.lang){
				caracter = campo.lang.split(';');
				for (j = 0; j < caracter.length; j++){
					if (campo.value.indexOf(caracter[j]) == -1){
						alert('Por favor, preencha o campo ' + campo.title + ' corretamente.');
						campo.focus();
						return false;
					}
				}
			}
			if(campo.title.toUpperCase() == 'SENHA'){
				campoSenha = document.getElementById(campo.id);
			}
			if(campo.title.toUpperCase() == 'CONFIRMAÇÃO DE SENHA'){
				campoConfSenha = document.getElementById(campo.id);
				if (campoSenha.value != campoConfSenha.value){
					alert('As senhas devem ser iguais.');
					campoConfSenha.focus();
				return false;
				}
			}
                    
		}
	}
	return true;
  }
	
	/**
 * DHTML date validation script for dd/mm/yyyy. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
return true
}