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")
     	return false
  	}
  	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     	alert("Invalid E-mail")
     	return false
  	}
  	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      	alert("Invalid E-mail")
      	return false
  	}
  	if (str.indexOf(at,(lat+1))!=-1){
      	alert("Invalid E-mail")
     	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")
      	return false
   	}
  	if (str.indexOf(" ")!=-1){
      	alert("Invalid E-mail")
      	return false
   	}
	return true          
}
function ValidateSendForm(){
	if (document.sendFriends.yourname.value==""){
    	alert("Please enter your name")
		document.sendFriends.yourname.focus()
    	return false
  	}
	var emailID=document.sendFriends.youremail;
	if ((emailID.value==null)||(emailID.value=="")){
    	alert("Please Enter your Email")
    	emailID.focus()
    	return false
  	}
	if (echeck(emailID.value)==false){
    	emailID.value=""
    	emailID.focus()
    	return false
  	}
  	if (document.sendFriends.name1.value==""){
    	alert("Please enter at least one friend")
		document.sendFriends.name1.focus()
    	return false
  	}
	var emailID=document.sendFriends.email1;
	if ((emailID.value==null)||(emailID.value=="")){
    	alert("Please Enter at least one friend's email")
    	emailID.focus()
    	return false
  	}	
  	else{return true;}
}