var autorInput=null;
    var emailInput=null;
    var subjectInput=null;
    var contentInput=null;
    var submitInput=null;


function validate()
        {
        if (autorInput==null) autorInput = document.getElementById('autor');
        if (emailInput==null) emailInput = document.getElementById('email');
    //  if (contentInput==null) contentInput = document.getElementById('content');
        if (submitInput==null) submitInput = document.getElementById('submit');
        var autor = autorInput.value;
        var email = emailInput.value;
    //  var txt = contentInput.value;

/*        if (autor.length==0) autorInput.style.backgroundColor ="#ccf5cc";
	else {autorInput.style.backgroundColor ="#fefefe"}

        if (email.length==0) emailInput.style.backgroundColor ="#ccf5cc";
	else emailInput.style.backgroundColor ="#fefefe";


        if (txt.length==0) contentInput.style.backgroundColor ="#ccf5cc";
	else contentInput.style.backgroundColor ="#fefefe";
*/

	if (autor.length>0&&email.length>0) submitInput.removeAttribute('disabled');
        else submitInput.disabled='disabled';
        
        }




function clearForm()
	{
        if (autorInput==null) autorInput = document.getElementById('autor');
        if (emailInput==null) emailInput = document.getElementById('email');
        if (subjectInput==null) subjectInput = document.getElementById('subject');
        if (contentInput==null) contentInput = document.getElementById('content');
        if (submitInput==null) submitInput = document.getElementById('submit');
	autorInput.value = '';
	emailInput.value = '';
	subjectInput.value = '';
	contentInput.value = '';
	submitInput.disabled='disabled';

	autorInput.style.backgroundColor ="#ccf5cc";
	emailInput.style.backgroundColor ="#ccf5cc";
	contentInput.style.backgroundColor ="#ccf5cc";

}