// JavaScript Document
function val_contact_us()
{
	if(isEmpty(document.getElementById('first_name'),"Please enter your first name")==false)
		{
			document.getElementById('first_name').select();
			document.getElementById('first_name').focus();
			return false;
		}	
			if(isEmpty(document.getElementById('last_name'),"Please enter your last name")==false)
		{
			document.getElementById('last_name').select();
			document.getElementById('last_name').focus();
			return false;
		}	
	if(echeck(document.getElementById('email_address').value)==false)	
		{
			document.getElementById('email_address').select();
			document.getElementById('email_address').focus();
			return false;
		}	
		
	if(isEmpty(document.getElementById('comments'),"Please enter your comments")==false)
		{
			document.getElementById('comments').select();
			document.getElementById('comments').focus();
			return false;
		}	
	if(isEmpty(document.getElementById('code'),"Please enter your security code")==false)
		{
			document.getElementById('code').select();
			document.getElementById('code').focus();
			return false;
		}	
}


//Check empty validation						
function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	else
	{
		 return true;
	}
}

//Email Validation
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str=='')
			{
			alert("Please enter your E-mail ID")
			return false;
			}
		if (str.indexOf(at)==-1)
		{
		   alert("Please enter valid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please enter valid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please enter valid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }

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

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