function validate_form(myForm){
	var error = 0;
	if (myForm.elements["firma"].value == ""){
		error = 1;
	}
	
	if (myForm.elements["adresse"].value == ""){
		error = 1;
	}
	
	if (myForm.elements["tlf"].value == ""){
		error = 1;
	}
	
	if (myForm.elements["ref"].value == ""){
		error = 1;
	}
	
	if(error === 1){
		alert("Du har ikke udfyldt de nødvendige felter");
		return false;
	}
	else{
		
		window.setTimeout('somebodydothecleaning()', 2000)
		
		return true;	
	}
}

function somebodydothecleaning(){
	var myForm = document.forms[1];
	for(i = 0; i < myForm.elements.length; i++){ 
		if(myForm.elements[i].type == "text"){
			myForm.elements[i].value = "";
		}
	}
}