// JavaScript Document

function IsEmpty(aTextField) {
   if ((aTextField.value.length==0) || (aTextField.value==null) ||  (aTextField.value.charAt(0) == ' ')) 
   {
      return true;
   }
   else { return false; }
}


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(form)
{
   if(IsEmpty(form.name)) 
   { 
      alert('Enter Your Name') 
      form.name.focus(); 
      return false; 
   } 
   
   if(IsEmpty(form.telephone)) 
   { 
      alert('Enter Your Telephone No') 
      form.telephone.focus(); 
      return false; 
   } 
   
   if(IsEmpty(form.contacttime)) 
   { 
      alert('Enter Time to call you') 
      form.contacttime.focus(); 
      return false; 
   } 
   
   
    if(IsEmpty(form.email)) 
   { 
      alert('Enter your email') 
      form.email.focus(); 
      return false; 
   }
   
 
  	var emailID=document.form.email;
	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(IsEmpty(form.textarea)) 
   { 
      alert('Please write a message') 
      contactform.textarea.focus(); 
      return false; 
   } 
 
 
return true;
 
}