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 emailID=document.getElementById('email');	
	var nameID=document.getElementById('name');	
	var numberID=document.getElementById('number');	
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email Address")
		emailID.focus()
		return false
	}
		
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}	
	
	
	if ((nameID.value==null)||(nameID.value=="")){
		alert("Please Enter your Name")
		nameID.focus()
		return false
	}
		
	
	if((numberID.value==null)|| numberID.value.length < 10){
		alert("Please enter ten digits for your contact number (eg. 8765555555) no special characters required");
		numberID.focus();
		return false;
	}	
	
	return true
 }



function isNumberKey(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;
				
	return true;

}


function isAlphaKey(evt)
{
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 97 || charCode > 122) && (charCode < 65 || charCode > 90))
	return false;
				
	return true;

}

function updateValue(el){
  if(el.value=="") el.value="search entire site...";
}

function clearDefault(el) {
  if (el.defaultValue==el.value) el.value = ""
}