function enable1(name) {
	var email = document.emailForm.email.value;
	var content = document.emailForm.content.value;
	enableEmailControls(name,email,content);
}

function enable2(email) {
	var name = document.emailForm.name.value;
	var content = document.emailForm.content.value;
	enableEmailControls(name,email,content);
}

function enable3(content) {
	var name = document.emailForm.name.value;
	var email = document.emailForm.email.value;
	enableEmailControls(name,email,content);
}

function enableEmailControls(name, email, content) {

	if ( document.emailForm.name.value.length>0
	     && document.emailForm.email.value.length>0
	     && document.emailForm.content.value.length>0
	     ) {
		document.emailForm.send.disabled=false;
	} else {
		document.emailForm.send.disabled=true;
	}
	
	if ( wordcount(document.emailForm.content.value) >= 500 ) {
		alert("You have reached the word limit.");
		document.emailForm.submit.disabled=true;
		return false;
	} else {
		document.emailForm.content.disabled=false;
	}
}	

function wordcount(string) {
  var a = string.split(/\s+/g); // split the sentence into an array of words
  return a.length;
}

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("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

function ValidateForm(){
	var emailID=document.emailForm.email
	
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	return true
 }