function doerror() { 
   alert("error")
   return false; }
   //window.onerror = doerror;
      
   function limitText(limitField, limitNum) {
   	if (limitField.value.length >= limitNum) {
         alert("Maximum of " + limitNum + " characters allowed")
   		limitField.value = limitField.value.substring(0, limitNum);
   	} 
   }
   
   function checkForm() {
      if (document.forms.commentForm.username.value == "" || document.forms.commentForm.comment.value == "") {
         alert("You must enter your name and comment before submitting.")
         return false;
      } else {
         return true;
      }
   }   
   
   function checkForm() {
      if (document.forms.commentForm.username.value == "" || document.forms.commentForm.comment.value == "") {
         alert("You must enter your name and comment before submitting.")
         return false;
      } else {
         return true;
      }
   }   
   
   
//Email validation
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					
	}