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.getElementById('e_mail');
	
	if ((emailID.value==null)||(emailID.value=="")){
		//alert("Please Enter your Email ID");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	return true;
 }
function validate()
{
  var cbform= document.getElementById('cform');

   

  if (cbform.fname.value == "") 
  {
    alert( "Please enter your Name." );
    cbform.fname.focus();
    cbform.fname.style.background = '#FFF';
	cbform.fname.style.border='1px solid #AAA';
    return false ;
  }
  else if (cbform.e_mail.value == "") 
  {
    validateform();
    alert( "Please enter your Email Id." );
    cbform.e_mail.focus();
    cbform.e_mail.style.background = '#FFF';
	cbform.e_mail.style.border='1px solid #AAA';
    return false ;
  }
  else if (cbform.subject.value == "") 
  {
    alert( "Please enter your Subject." );
    cbform.subject.focus();
    cbform.subject.style.background = '#FFF';
	cbform.subject.style.border='1px solid #AAA';
    return false ;
  }
  else if (cbform.comments.value == "") 
  {
    alert( "Please enter your Comments." );
    cbform.comments.focus();
    cbform.comments.style.background = '#FFF';
	cbform.comments.style.border='1px solid #AAA';
    return false ;
  }

  else{
  return true ;
}
}