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 enter a valid email address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please enter a valid email address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please enter a valid email address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Please enter a valid email address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Please enter a valid email address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please enter a valid email address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Please enter a valid email address")
		    return false
		 }

 		 return true					
	}

function ValidateForm(){
	var emailID=document.frmSample.email;
	var from=document.frmSample.from_date;
	var to=document.frmSample.to_date;
	var numPeople=document.frmSample.numPeople;
	var msg=document.frmSample.message;
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter all required fields...");
		return false;
	}
	if ((from.value==null)||(from.value=="")){
		alert("Please enter all required fields...");
		return false;
	}
	if ((to.value==null)||(to.value=="")){
		alert("Please enter all required fields...");
		return false;
	}
	if ((numPeople.value==null)||(numPeople.value=='--Please Select--')){
		alert("Please enter all required fields...");
		return false;
	}
	if ((msg.value==null)||(msg.value=="")){
		alert("Please enter all required fields...");
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	return true;
 }