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("Please entervalid Email ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		    alert("Please entervalid Email ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		     alert("Please entervalid Email ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		     alert("Please entervalid Email ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		     alert("Please entervalid Email ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		     alert("Please entervalid Email ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		     alert("Please entervalid Email ID")
		    return false
		 }

 		 return true					
	}

	  
	  function myfun(){

			if(document.form1.Arrival_Date.value==''){
					alert('Please Enter Arrival Date');	
					document.form1.Arrival_Date.focus();
					return (false);
				}
				
				if(document.form1.Nights.value==''){
					alert('Please Enter Nights');	
					document.form1.Nights.focus();
					return (false);
				}
				/*if(document.form1.Agency_Email.value==''){
					alert('Please Enter Agency Email');	
					document.form1.Agency_Email.focus();
					return (false);
				}else if (echeck(Agency_Email.value)==false){
					Agency_Email.value=""
					Agency_Email.focus()
					return false
				}*/
				
				if(document.form1.Guests.value==''){
					alert('Please Enter Guests');	
					document.form1.Guests.focus();
					return (false);
				}
				


			return (true);
			
	}