gotFocus = function(element, text) {
	    var textBox = document.getElementById(element);
	    //if (textBox.value == 'Λέξη κλειδί') {
	    if (textBox.value == text) {
	        textBox.value = '';
	    }
	    textBox.className= 'GotFocus';
	}
	lostFocus = function(element, text) {
	    var textBox = document.getElementById(element);
	    if (textBox.value == '' || textBox.value == text) {
	        //textBox.value = 'Λέξη κλειδί';
	        textBox.value = text;
	        textBox.className= 'LostFocus';
	    }
	}
	pageChange = function(page) {
	    var reg = /^\d+$/;
	    if (reg.test(page)) {
	        document.form1.pageNum.value = page;
	        document.form1.submit();
	    }
	}
	function onlyNumbers(e) {
        var keynum
        var keychar
        var numcheck
        if(window.event) // IE
	    {
	        keynum = e.keyCode
	    }
        else if(e.which) // Netscape/Firefox/Opera
	    {
	        keynum = e.which
	    }
        if(keynum == 13) { 
            pageChange(document.form1.gotoPage.value); 
        }
        keychar = String.fromCharCode(keynum)
        numcheck = /\d/
        return numcheck.test(keychar)
    }
    
    printStyle = function() {
        document.styleSheets[1].disabled=true;
        document.styleSheets[0].disabled=false;
    }
    screenStyle = function() {
        document.styleSheets[0].disabled=true;
        document.styleSheets[1].disabled=false;
    }
    
    setFont = function(size) {
        if (size =='smaller') {
            if (document.getElementById('Content').style.fontSize == 'medium') {document.getElementById('Content').style.fontSize = 'small';}
            if (document.getElementById('Content').style.fontSize == 'large') {document.getElementById('Content').style.fontSize = 'medium';}
            if (document.getElementById('Content').style.fontSize == '') {document.getElementById('Content').style.fontSize = 'small';}
            setCookie('myFontSize',document.getElementById('Content').style.fontSize,365);
        }
        else if (size=='larger') {
           if (document.getElementById('Content').style.fontSize == 'medium') {document.getElementById('Content').style.fontSize = 'large';}
           if (document.getElementById('Content').style.fontSize == 'small') {document.getElementById('Content').style.fontSize = 'medium';}
           if (document.getElementById('Content').style.fontSize == '') {document.getElementById('Content').style.fontSize = 'large';}
           setCookie('myFontSize',document.getElementById('Content').style.fontSize,365);
        }
    }
    
    //remember font size
    function getCookie(c_name)
    {
    if (document.cookie.length>0)
      {
      c_start=document.cookie.indexOf(c_name + "=");
      if (c_start!=-1)
        { 
        c_start=c_start + c_name.length+1; 
        c_end=document.cookie.indexOf(";",c_start);
        if (c_end==-1) c_end=document.cookie.length;
        return unescape(document.cookie.substring(c_start,c_end));
        } 
      }
    return "";
    }

    function setCookie(c_name,value,expiredays)
    {
    var exdate=new Date();
    exdate.setDate(exdate.getDate()+expiredays);
    document.cookie=c_name+ "=" +escape(value)+
    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
    }
    
    //font size
    function checkCookie()
    {
    myFontSize=getCookie('myFontSize');
    if (myFontSize!=null && myFontSize!="")
      {
      document.getElementById('Content').style.fontSize = myFontSize;
      }
    }