function VideosChange(VideoNumber,Point,NoOfImg){
    for(var i = 1; i < NoOfImg+1;i++){
        document.getElementById('video'+i).className = "videoH";
        document.getElementById('vI'+i).className = "videoInfoH";
		if(i == VideoNumber){
			document.getElementById('video'+VideoNumber).className = "videoS";
			document.getElementById('vI'+VideoNumber).className = "videoInfoS";
		}
    }
}

function check_contact(form) 
{
var emailFilter=/^.+@.+\..{2,3}$/;
var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/;
var re = /\s/;									
	if (form.Name.value == ''){
		alert("Please enter your name...");
		form.Name.focus();
		return false;
	}
	var stripped = form.Tel.value.replace(/[\(\)\.\-\ ]/g, '');
	if (form.Tel.value=='' || isNaN(parseInt(stripped))) {
		alert("Your telephone number is incomplete or contains invalid characters...");
		form.Tel.focus();
		return false;
	}
	if (form.Email.value=="" || form.Email.value.match(illegalChars) || !(emailFilter.test(form.Email.value))){
		alert("Please enter a valid email address...");
		form.Email.focus();
		return false;
	}
}