function echeck(str) {

			var at="@"
			var dot="."
			var lat=str.indexOf(at)
			var lstr=str.length
			var ldot=str.indexOf(dot)
			if (str.indexOf(at)==-1)
			  return false
			if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
			  return false
			if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
			   return false
			if (str.indexOf(at,(lat+1))!=-1)
			   return false
			if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
			   return false
			if (str.indexOf(dot,(lat+2))==-1)
			    return false
			if (str.indexOf(" ")!=-1)
			    return false
			return true 
 	}	 					
	
function check_fields(formname) { 
    if(formname.cname.value=="") {
      alert("You must fill your name!");
      document.getElementById("cname").focus()
       return false;
    }
    if(formname.email.value=="") {
      alert("You must fill your email");
      document.getElementById("email").focus()
      return false;
    }
    if(!echeck(formname.email.value)) {
      alert("Not a valid Email");
      document.getElementById("email").focus()
      return false;
    }
    if(formname.comment.value=="") {
      alert("You must fill a comment!");
      document.getElementById("comment").focus()
      return false;
    }
    return true;
  }
  
 
 		function PopupPic(x,w,h) { 
 		tw=w;//table width
 		w+=27;
 		h+=150;
 		
 		window.open("image-detail.php?tw="+tw+"&imageid="+x,"","width="+w+",height="+h+",resizable=no,scrollbars=yes,status=0");
 		
					
	}