//The validate.js file validates the input fields

function ValidateInfo(){

	if (Trim(document.hys.namex.value)=="") {
		alert("Please fill in the Name ");
		document.hys.namex.focus();
		return false;
	}else if (Trim(document.hys.city.value)=="") {
		alert("Please fill in the City ");
		document.hys.city.focus();
		return false;
	}else if (Trim(document.hys.comment.value)=="") {
		alert("Please fill in the Comments ");
		document.hys.comment.focus();
		return false;
	}else if (Trim(document.hys.emailx.value)=="") {
		alert("Please fill in the Contact Email");
		document.hys.emailx.focus();
		return false;
	}else if ((Trim(document.hys.emailx.value) != "") && (echeck(Trim(document.hys.emailx.value))==false)) {
		document.hys.emailx.focus();
		return false;
	}else
	{
		return true;
	}
}


function Trim(s) 
{
  // Remove leading spaces and carriage returns
  
  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r'))
  {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces and carriage returns

  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r'))
  {
    s = s.substring(0,s.length-1);
  }
  return s;
}

// function for validating email address

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){
		   alert("You have entered an invalid email ID!")
			   
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("You have entered an invalid email ID!")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("You have entered an invalid email ID!")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("You have entered an invalid email ID!")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("You have entered an invalid email ID!")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("You have entered an invalid email ID!")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("You have entered an invalid email ID!")
		    return false
		 }

 		 return true					
	}
// end of the function