function trim(myString){
 
   return myString.replace( /^\s+/g,'').replace(/\s+$/g,'');
   
}

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 contactus(){
	
	x = document.frm_contact;

	str = trim(x.name.value);
	if(str == ""){
	   alert("Please enter name");
	   x.name.value = "";
	   x.name.focus();
	   return false;
	}
	
	//email validation
	var emailID=x.email;
	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
	}//end of mail validation
	
	str = trim(x.phone.value);
	if(str == ""){
	   alert("Please enter phone");
	   x.phone.value = "";
	   x.phone.focus();
	   return false;
	}
	str = trim(x.comment.value);
	if(str == ""){
	   alert("Please enter Preferred Call back time");
	   x.comment.value = "";
	   x.comment.focus();
	   return false;
	}
	return true;
}


function login(){
	
	x = document.frm_login;

	str = trim(x.username.value);
	if(str == ""){
	   alert("Please enter username");
	   x.username.value = "";
	   x.username.focus();
	   return false;
	}
	
	str = trim(x.password.value);
	if(str == ""){
	   alert("Please enter password");
	   x.password.value = "";
	   x.password.focus();
	   return false;
	}
	return true;
}

function newsletter(){
	
	x = document.frm_newsletter;
	
	//email validation
	var emailID=x.email;
	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
	}//end of mail validation
	return true;
}