<!-- FORM VALIDATION PAGE -->

function validateFormOnSubmit(){
	
	//validate name
	if( document.f1.name.value == "" ){
		alert("Please fill in your name.");
		document.f1.name.focus();
		return false;}

	if(!ValidateName(document.f1.name.value,"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+-. ")){
	    alert("Name can contain letters only");
		document.f1.name.focus();
	        return false;}
		
	//validate phone number
	if(document.f1.phone.value == ""){
		alert("Please fill in a contact number.");
		document.f1.phone.focus();
		return false;
	}
	
	if(!ValidateName(document.f1.phone.value,"0123456789+-. ")){
	    alert("Phone can contain numbers only.");
		document.f1.name.focus();
	       return false;}

	//validate email
	var emailID=document.f1.email;
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	
	//validate time to call
	if(document.f1.whencall.options[document.f1.whencall.selectedIndex].value == 0){
	alert("Please select when you prefer to be called");
	document.f1.whencall.focus();
	return false;}

	loading.style.visibility = "visible";
	return true;
		}
		

function ValidateName(NumStr, String)
	{    
	for(var Idx=0; Idx<NumStr.length; Idx++)    
	{        
	var Char = NumStr.charAt(Idx);        
	var Match = false;        
	for(var Idx1=0; Idx1<String.length; Idx1++)        
	{            
	   if(Char == String.charAt (Idx1))                
	       Match = true;	
	}        
	if (!Match)           
 	    return false;    
	}    
	return true;
	}
 
 
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					
	}