function checkemail(str,ret) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
	
		
//		alert ('check email function enter')

		var at="@";
		var dot="." ;
		var lat=str.indexOf(at);
		var lstr=str.length;
		var ldot=str.indexOf(dot);
		lastchar=str.charAt((lstr-1)) 				

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

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

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


		 if (str.substring(lat-1,lat)==dot) {			
		    alert("Invalid E-mail Address: Dot at wrong place(s).")
		    return false
		 }

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

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

		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid E-mail Address: Remove space from address")
		    return false
		 }

		 if ((lastchar=='.') || (lastchar==' ') || (lastchar == '&') ||  (lastchar == '$')) {  			
		    alert("Invalid E-mail Address: Remove invalid charcaters at end")
		    return false
		 }

//		alert ('check email function exit');

	return true					
	}