function SendForm(){
	var vOk = 0;
	var vMsg = ''; //"\nThe following errors have been detected: \n";	
  if (document.getElementById("name").value.length == 0 ) {	
		vMsg += "\n  Please enter your  name.";
		vOk++;
	}
	//********* valida email
	var vemail = document.getElementById("email").value;
	var vlong = vemail.length;
	var varr = 0;
	var vdot = 0;
	for (var L=0; L<vlong; L++) {
		var oneChar = vemail.charAt(L);
		if (oneChar == '@') {
  			varr++;
		}
   	if (oneChar == '.') {
  			vdot++;
   	}
	} 
	if ( (varr == 1) && (vdot > 0) ) {
	} else {
		vMsg += "\n  Please enter a valid email address.";		
		vOk++;		
	}

	if (vOk == 0) {	
			document.frmmail.submit();
		//get(this.parentNode);
	}else{
		alert (vMsg);
	}	

}

	function backVideo(){
	  if( minim != 0 ){
	    hide =maxim;
	    minim--;
	    maxim--;
	  //  hide = (parseInt(maxim)+ parseInt(1));
	    show = (minim);
	    if (document.getElementById("video_tefl_" + hide ))
	    document.getElementById("video_tefl_" + hide ).style.display = "none";
	    if (document.getElementById("video_tefl_" + show ))
	    document.getElementById("video_tefl_" + show ).style.display = "block";
	  }
	}
	function nextVideo(){
	  if( full != maxim){
	    hide = minim;
	    minim++;
	    maxim++;
	   // hide = (parseInt(minim)- parseInt(1));
	    show = (maxim);
	    if (document.getElementById("video_tefl_" + hide ))
	    document.getElementById("video_tefl_" + hide ).style.display = "none";
	    if (document.getElementById("video_tefl_" + show ))
	    document.getElementById("video_tefl_" + show ).style.display = "block";
	  }
	}
	function showMenu(idx){
		if (idx == 0){
			  document.getElementById("menu2").style.display = "none";
	      document.getElementById("menu" + idx ).style.display = "block";
	  }else{
	  		document.getElementById("menu1").style.display = "none";
	      document.getElementById("menu" + idx ).style.display = "block";
	  }
	}
	function showVideo(idxvideo){
		  play =idxvideo;
		if (stopvideo != play){
			if (stopvideo != null)
		    document.getElementById("video_tefl" + stopvideo ).style.display = "none";
		    document.getElementById("video_tag" + stopvideo ).style.display = "none";
		    document.getElementById("video_desc" + stopvideo ).style.display = "none";
	    if (play != null)
		    document.getElementById("video_tefl" + play ).style.display = "block";
		    document.getElementById("video_tag" + play ).style.display = "block";
		    document.getElementById("video_desc" + play ).style.display = "block";
		    stopvideo=idxvideo;
	  }
	}
	function showVideoShow(idxvideo){
		  play =idxvideo;
		if (stopvideo != play){
			if (stopvideo != null)
		    document.getElementById("video_tefl" + stopvideo ).style.display = "none";
	    if (play != null)
		    document.getElementById("video_tefl" + play ).style.display = "block";
		    stopvideo=idxvideo;
	  }
	}

function SubmitCategory(idx){
	 document.getElementById('idxcategory').value=idx;
	 document.frmCat.submit();
}