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 emailID1=document.friend.emailadress0
	var emailID2=document.friend.emailadress1
	var emailID3=document.friend.emailadress2
	var emailID4=document.friend.emailadress3
	var emailID5=document.friend.emailadress4
	
	
	
	if ((emailID1.value==null)||(emailID1.value=="")){
		alert("Please Enter Your Email! ")
		emailID1.focus()
		return false
	}   
	if (echeck(emailID1.value)==false){
		emailID1.value=""
		emailID1.focus()
		return false
	}
		   
	  if ((emailID2.value==null)||(emailID2.value=="")){
		alert("Please Enter At Least One Receipient! ")
		emailID2.focus()
		return false
	}   
	if (echeck(emailID2.value)==false){
		emailID2.value=""
		emailID2.focus()
		return false
	}
	
	if(emailID3.value!=="") {
	if (echeck(emailID3.value)==false){
		emailID3.value=""
		emailID3.focus()
		return false
	}
	}
	
	if(emailID4.value!=="") {
	if (echeck(emailID4.value)==false){
		emailID4.value=""
		emailID4.focus()
		return false
	}}
	
    if(emailID5.value!=="") {
	if (echeck(emailID5.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}}
	
	return true
 }