function checkForm(){
	var date = document.getElementById('date');
	var nr = document.getElementById('nr');
	var from = document.getElementById('from');
	var to = document.getElementById('to');
	var email = document.getElementById('email');
	var errors = 0;
	
	if(date.value == ''){
		document.getElementById('dateError').style.display = '';
		errors++;
	}else{
		document.getElementById('dateError').style.display = 'none';
	}
	if(from.value == ''){
		document.getElementById('fromError').style.display = '';
		errors++;
	}else{
		document.getElementById('fromError').style.display = 'none';
	}
	if(to.value == ''){
		document.getElementById('toError').style.display = '';
		errors++;
	}else{
		document.getElementById('toError').style.display = 'none';
	}
	
	if(email.value == ''){
		document.getElementById('emailError').style.display = '';
		errors++;
	}else if(email.value.indexOf('@') == -1){
		document.getElementById('emailError').style.display = '';		
		errors++;
	}else{
		document.getElementById('emailError').style.display = 'none';
	}

	if(nr.value == ''){
		document.getElementById('nrError').style.display = '';
		document.getElementById('nr2Error').style.display = 'none';
		errors++;
	}else if(IsNumeric(nr.value)==false){
		document.getElementById('nrError').style.display = 'none';
		document.getElementById('nr2Error').style.display = '';
		errors++;
	}else{
		document.getElementById('nrError').style.display = 'none';
		document.getElementById('nr2Error').style.display = 'none';
	}
	

	
	
	if(errors == 0){
		return true;
	}

}

function IsNumeric(sText)

{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }